Open Source Android Scheduling Apps
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Scheduling Apps for Android
View 159 business solutionsBrowse free open source Scheduling apps and projects for Android below. Use the toggles on the left to filter open source Scheduling apps by OS, license, language, programming language, and project status.
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Etar Calendar
Android open source calendar
Etar is an open-source material-designed calendar made for everyone. -
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ClassIsland
A powerful, customizable, cross-platform timetable information display
ClassIsland is a free, open-source classroom information display application designed for multimedia screens in educational environments. It displays daily schedules, current classes, and upcoming lessons in an unobtrusive desktop interface. Teachers can configure notifications for class transitions using sounds, speech, and visual effects. The software provides a timetable editor with Excel importing, rotating schedules, and temporary class substitutions. Customizable components can display clocks, dates, weather forecasts, and countdowns. Its automation system performs scheduled actions, including opening applications and showing reminders. Themes, plugins, and password-protected settings provide additional flexibility. Available for Windows, macOS, and Linux, ClassIsland helps organize classroom activities. -
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Joda-Time
Replacement for the Java date and time classes prior to Java SE 8
The standard date and time classes prior to Java SE 8 are poor. By tackling this problem head-on, Joda-Time became the de facto standard date and time library for Java prior to Java SE 8. Note that from Java SE 8 onwards, users are asked to migrate to java.time (JSR-310) - a core part of the JDK which replaces this project. The design allows for multiple calendar systems, while still providing a simple API. The “default” calendar is the ISO8601 standard which is used by many other standards. The Gregorian, Julian, Buddhist, Coptic, Ethiopic and Islamic calendar systems are also included. Supporting classes include time zone, duration, format and parsing. Joda-Time provides a quality replacement for the Java date and time classes. Joda-Time is the de facto standard date and time library for Java prior to Java SE 8. Users are now asked to migrate to java.time (JSR-310). -
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Simple Calendar
A simple calendar with events, customizable widgets and no ads
The most handy calendar out there. Manage your events and reminders easily. Simple Calendar Pro is a really flexible calendar with many event related options. It offers powerful repetition rules, optional CalDAV synchronization, ics file handling and much more. Top notch design ensures the best possible user experience. You will get familiar with it really quickly. You can create new events really quickly by predefining default values, or by duplicating existing events. There are many views you can choose from, depending on your preference. No matter if you want to see just 1 day or 1 year, this app supports it. Personalize your experience by changing any app color. You can even change the apps' icon color to make sure it matches your home screen. The Pro one already has many new features including time zone support, attendees and email type of reminders in CalDAV synced events, then many other bugfixes and stability improvements. -
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Lifeograph
Cross-platform, parametric note-taking application
Lifeograph combines powerful features with a clean and thoughtfully designed interface. Your data stays on your device, and built-in encryption keeps privacy at the core. With WYSIWYG editing, your entries always appear in their final form. Integrated data extraction tools transform your journal entries into dynamic tables and charts. -
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Calendar、Task This is only a read-only mirror repository. Main repository: https://github.com/KangLin/Calendar
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Date Picker Calendar OpenOffice Calc
Date Picker Calendar extension for OpenOffice Calc
Date Picker Calendar (Latest version 2.60) Set a date in selected cell/cells. Creates a calendar push button in the selected cell and places the date in the cell next to the button. All functions are also in the menu: Tools - Add-Ons. It is possible to change certain settings via the 'Settings' button on the help screen. Calendar Help is located in the help menu of OpenOffice. Toolbar buttons: - Date: the date from the calendar will be inserted in the selected cell/cells. - Date <-Button: a calendar button is created in the selected cell, the date is inserted in the cell to the left of the button. - Button-> Date: a calendar button is created in the selected cell, the date is inserted in the cell to the right of the button. -
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Mindwtr
A complete Getting Things Done (GTD) productivity system for desktop a
Mindwtr: The Privacy-First GTD System Mindwtr is a Getting Things Done (GTD) productivity tool designed for "Mind Like Water." It runs completely offline—no accounts, no tracking, and no subscriptions. The Core GTD Workflow Capture: Instantly offload thoughts to your Inbox. Clarify: Process tasks rapidly with the built-in "2-Minute Rule" timer. Organize: Sort tasks by Contexts (@work, @home), Areas, and Projects. Reflect: Keep your system trustworthy with a guided Weekly Review. Engage: Filter Next Actions by energy level or time available. Powerful Features Local-First: Your data lives on your device (SQLite). You own it 100%. Flexible Sync: Sync privately via File System (Syncthing, iCloud) or WebDAV (Nextcloud). Focus View: A unified dashboard for your calendar events and next actions. Kanban Boards: Visualize projects with drag-and-drop columns. Stop managing your data. Start getting things done. -
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Personal Planner
Offline planner with time blocking, timers and daily reviews
Personal Planner is a free, open-source daily planner for Windows, macOS, Linux and Android. Plan your day in time blocks, time your tasks, and compare what you planned with what actually happened. I built it because I kept setting aside 30 minutes for a task, spending an hour on it, then making the same estimate the next day. Daily and weekly reviews keep your tasks, actual time and notes together, so you have something useful to look back on. Recurring tasks and templates help with regular plans. An inbox holds ideas for later, while experiments let you track a routine using time you've already recorded. It works offline without an account, with data stored on your device. Optional cross-device sync uses your own Supabase project and requires setup. Built with Flutter and SQLite, and released under the MIT license. No subscriptions or paid feature tiers. -
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Free Academic Timetable Software
Free web timetabling software for education and training providers.
A user friendly web-based timetabling software designed for all types of education and training providers to schedule classes, facilities, trainers and split classes into groups. It was designed by an academic professional with over 5 years experience in education timetabling systems and 14 years experience in the education and training sector. It is easy to set up and is really user friendly for everyone. Comes with manuals, training videos and is free to use and install, but not for sale. To see demo in operation, just visit our website and enter username & password admin to login. This software works on PHP version 5.4 and back. I have used successfully on newer PHP versions upto version 7. If you incounter any database write and looping errors, just set your CPanel PHP to the default 5.4 PHP version and it will work perfectly. Feel free to update the PHP code for newer versions of PHP, but please contribute back upgrades to the community to keep this project alive. -
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openCRX - Enterprise Class CRM
professional CRM and groupware service, ready for the cloud
openCRX moved to https://github.com/opencrx -
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Asset Management System for Intranets
The Free & Popular Snipe-IT Web Software in a Complete Virtual Machine
This VM is created for 2 reasons: 1. Very little initial setup work required to make an Asset Management System live, within minutes. 2. This system should keep running for Years, without requiring Updates / Breakages. If you are new to Virtual Machines, then please watch the Video below ( taken from my other project. just replace td with am wherever mentioned ) After starting this VM, please login to its administration panel with: Website Address: https://am.local/ ( Accept Any Warnings due to Usage of Self-Signed https Certificates ) Admin Username: admin Admin Password: Change_this1 from any PC on your Local Network. Explore all the available Menu options, before beginning any data entry. Configure OUTGOING MAIL SERVER SETTINGS in the .env file, using the free FileZilla ftp client software's edit facility. See below. Backup the system regularly, to avoid any issues. These are also covered in the video. Google Search helps in finding more about Snipe-IT. -
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EasyNotes
Apps notes for Windows, iOS and Android, with direct local sync
Apps notes for Windows, iOS and Android, with direct local sync. The server is a Windows application so you need to run it for sync. If you want to leave the old date when editing a note then on mobile phones you need to click on the date and on the PC hold down the "Shift" key when you click on the done button. How to install and other things - https://github.com/r57zone/EasyNotes -
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Skedoff
Plan offline. Post when ready. No cloud, no account.
Skedoff is a privacy-first, offline-first social media content planner for creators who want to write drafts without handing their content to a server they don't control. No account required. No cloud sync. No auto-posting. No analytics. Everything lives on your device. The workflow is simple: Draft → Queue → Published. Write your captions, tag the platform, move them through the flow at your own pace. When you're ready, open your social app, paste, and publish. You stay in control. v1.0.1 ships Skedoff Workstation — a desktop companion that lets you edit your phone drafts from your PC over local Wi-Fi. No relay server. No internet required. Available on Android (Google Play), Linux (.deb, AppImage), and Windows (.exe). Built by FlagoDNA — a solo studio building privacy-first tools. -
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The task manager is a program with support people in mind. It will assist in juggling all those incomming calls, show the impact of accepting a task at a certain time. Assist in rshufling tasks after a set of rules. It is intended to run on Palm/Unix and
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työvuorolista
Työvuorosuunnittelutyökalu Kalenteri 2026
Työvuorosuunnittelujärjestelmä LibreOffice- ja OpenOfficeCalc- alustalla pienille ja keskisuurille ravintola- ja hotelliyrityksille suomenkielellä (MaRa). Taulukot päivittyvät kalenterin mukaan. Ohjeet taulukossa tyovuorosuun04022d.ods. Taulukot voidaan asetuksissa säätää myös paikallisille sopimuksille. Suunnittelu tapahtuu käytettävissä olevan pilvipalvelun avulla. Kaikki työvuorojen suunnittelijat voivat käsitellä koko vuoden listoja android- ja iOS-laitteilla. -
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This android app reminds you about upcoming birthdays. You can read and write the date of birth of all contacts in your address book. This project moved to GitHub: https://github.com/sealor/BirthdayReminder
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Birday
A beautiful Kotlin app to remember birthdays and events
This app was created to remember and manage events in a simple and effective way. The app contains some basic personalization options and an introduction, plus some new resources like animated vector drawables and the automatic dark/light theme. Support and updates are guaranteed. Birday allows you to import birthdays directly from your contacts, with a simple favorite system and a set of stats to discover. -
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Capacity Planning & Management Software
Free & Open Capacity Planning Software in a Complete Virtual Machine
Every Profession has some sort of Resource to manage, be it materials, money, physical or logical resources & with it some vital queries to be answered: At what Rate is my Resource getting consumed? How Long will current stock last? What will be near future requirement? In Just Two Simple steps of Defining Your Resource & Actively Tracking its Consumption, you will be in total control of your Resource, with this Software. After starting this VM, from any PC on your Local Network, access the: Application Website: https://trcfir.local ( Accept Any Warnings due to Usage of Self-Signed https certificates ) Logins: operator & groupsmanager Password: change_this If you are new to Virtual Machines, then please watch the Video below ( taken from my other project. just replace td with trcfir wherever mentioned ) Backup system regularly as shown in video, to avoid any issues. This VM helps to make a Capacity Planning Software / Server live, within minutes. -
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CountDownWidget
Android widget, counting days before certain events
It is widget for counting days to certain events -
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CrunchyCalendar
A beautiful material calendar with endless scroll, range selection
A beautiful material calendar with endless scroll, range selection, and a lot more. A light, powerful and easy-to-use Calendar Widget with a number of box features. -
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DAVx⁵
CalDAV/CardDAV suite and sync app for Android
DAVx⁵ is a free, open-source Android synchronization application designed to connect calendars, contacts, and tasks with compatible online services. It uses CalDAV and CardDAV standards to synchronize personal information between Android devices and remote servers. The application integrates with Android's account and synchronization infrastructure, allowing information to appear in compatible calendar, contact, and task applications. DAVx⁵ supports self-hosted services and providers such as Nextcloud, ownCloud, and other standards-compliant servers. It also provides WebDAV file access through Android's Storage Access Framework. Automatic configuration simplifies account setup and resource discovery. Its privacy-focused architecture gives users flexibility in choosing where their personal information is stored and synchronized. -
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Material DateTime Picker
Pick a date or time on Android in style
Material DateTime Picker tries to offer you the date and time pickers as shown in the Material Design spec, with an easy themable API. The library uses the code from the Android frameworks as a base and tweaked it to be as close as possible to Material Design example. (Android 4.0 was supported until 3.6.4). The easiest way to add the Material DateTime Picker library to your project is by adding it as a dependency to your build.gradle. You may also add the library as an Android Library to your project. All the library files live in library. The library also uses some Java 8 features, which Android Studio will need to transpile. The library follows the same API as other pickers in the Android framework. The library contains 2 layout versions for each picker. Version 1 is the original layout. It is based on the layout google used in the kitkat and early material design era. And version 2 is based on the guidelines google posted when launching android marshmallow. -
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Monthly Calendar
Android calendar app focusing on a good view of a month.
An Android calendar app focusing on a good view of a month, because I like the monthly view, and never use weekly view. So do you? Then this might be for you. For Android 4.0 and above. Legacy (Android 2.2+) version also available. -
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Get information about delays in systems like public transport systems by the users of such systems, Use this collected information to calculate a forecast of the point of time of an upcoming event like an arrival.
