NotePlan
Your tasks, notes, and calendar all linked in one place. Use the flexibility of Markdown to quickly create tasks. Add options for repeating to-dos, easily move tasks into the future, and add tags and mentions. Speed up your workflow with natural language input and autocompletion of tags, mentions, and links. Meeting minutes, reference material, or quick notes: store everything in NotePlan. Organize your notes any way you like. From simple folders or a digital Bullet Journal to a fully linked Zettelkasten system. All stored locally and available on every device. A note for each day keeps you in control of your schedule, today and tomorrow. Outline your tasks, write down and link your notes, even block time right in your calendar. See exactly what’s on your calendar, plan ahead, or look back. Everything you put into NotePlan is stored in plaintext Markdown files, easily opened in any text editor. That means you’re never locked in and always in control of your files.
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Joplin
Joplin is a free, open source note taking and to-do application, which can handle a large number of notes organized into notebooks. The notes are searchable, can be copied, tagged and modified either from the applications directly or from your own text editor. The notes are in Markdown format. Notes exported from Evernote via .enex files can be imported into Joplin, including the formatted content (which is converted to Markdown), resources (images, attachments, etc.) and complete metadata (geolocation, updated time, created time, etc.). Plain Markdown files can also be imported. The notes can be synchronized with various cloud services including Nextcloud, Dropbox, OneDrive, WebDAV or the file system (for example with a network directory). When synchronising the notes, notebooks, tags and other metadata are saved to plain text files which can be easily inspected, backed up and moved around. The application is available for Windows, Linux, macOS, Android and iOS.
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Taskwarrior
Taskwarrior scales to fit your workflow. Use it as a simple app that captures tasks, shows you the list, and removes tasks from that list. Leverage its capabilities though, and it becomes a sophisticated data query tool that can help you stay organized, and get through your work. Taskwarrior is methodology-neutral. Whether you follow GTD, use the Pomodoro technique, or just do whatever works for you, Taskwarrior provides capabilities to help you, not restrict you. Taskwarrior is an active, vibrant project. In the last year, it has averaged 5.58 changes per day. Taskwarrior enjoys lively participation from many contributors, with currently over 60 providers of code patches. But there are even more contributors (252 of them) helping out with documentation, bugs, support, ideas, requests and extensions. It's just going to keep getting better.
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Todo.txt
So many power users try dozens of complicated todo list software applications, only to go right back to their trusty todo.txt file. But it's not easy to open todo.txt, make a change, and save it—especially on your touchscreen device and at the command line. Todo.txt apps solve that problem. You're not going to find many checkboxes, drop-downs, reminders, or date pickers here. Todo.txt apps are minimal, todo.txt-focused editors which help you manage your tasks with as few keystrokes and taps possible. Countless productivity apps and sites store your tasks in their own proprietary database and file format. But you can work with your todo.txt file in every text editor ever made, regardless of operating system or vendor.
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