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Browse free open source C Software and projects below. Use the toggles on the left to filter open source C Software by OS, license, language, programming language, and project status.

  • Visitor Management and Staff Sign In | Sign In App Icon
    Visitor Management and Staff Sign In | Sign In App

    Sign In App is a modern, enjoyable way to sign in visitors and staff, and book desks and meeting rooms.

    Our visitor management system streamlines registration, check-in, and authorization processes, while our facility management tools streamline room booking, resource allocation, and asset management. We prioritize security with our advanced risk mitigation measures, including health and safety protocols, emergency messaging, and robust analytics for thorough auditing.
  • Run applications fast and securely in a fully managed environment Icon
    Run applications fast and securely in a fully managed environment

    Cloud Run is a fully-managed compute platform that lets you run your code in a container directly on top of Google's scalable infrastructure.

    Run frontend and backend services, batch jobs, deploy websites and applications, and queue processing workloads without the need to manage infrastructure.
  • 1
    GTK+2 for Windows Runtime Environment

    GTK+2 for Windows Runtime Environment

    The files required to run GTK+ applications on Windows

    This is the GTK+2 Runtime Environment Installer for Windows. It includes all of the files required to run GTK+2 applications on Windows. Some support tools are also available. This project is no longer maintained. Please use its successor: https://github.com/tschoonj/GTK-for-Windows-Runtime-Environment-Installer
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    Downloads: 1,802 This Week
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  • 2
    Poptop is an open source implementation of a PPTP server. Running under x86 or embedded Motorola ColdFire architectures Poptop provides full interoperability with the Microsoft PPTP VPN client.
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    Downloads: 2,509 This Week
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  • 3
    Ethernet bridge tables - Linux Ethernet filter for the Linux bridge. Contains the old sourcecode repository that is no longer maintained. Please see http://git.netfilter.org/ebtables/ and http://git.netfilter.org/arptables/ for the currently maintained repository (courtesy of the netfilter team).
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    Downloads: 3,009 This Week
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  • 4
    Wine

    Wine

    Run Windows applications on Linux, BSD, Solaris, and Mac OS X

    Wine is an Open Source implementation of the Windows API on top of X and Unix. Wine provides both a development toolkit for porting Windows sources to Unix and a program loader, allowing many unmodified Windows binaries to run on x86-based Unixes.
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    Downloads: 1,346 This Week
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  • ConnectWise Cybersecurity Management for MSPs Icon
    ConnectWise Cybersecurity Management for MSPs

    Software and support solutions to protect your clients’ critical business assets

    ConnectWise SIEM (formerly Perch) offers threat detection and response backed by an in-house Security Operations Center (SOC). Defend against business email compromise, account takeovers, and see beyond your network traffic. Our team of threat analysts does all the tedium for you, eliminating the noise and sending only identified and verified treats to action on. Built with multi-tenancy, ConnectWise SIEM helps you keep clients safe with the best threat intel on the market.
  • 5
    Burn

    Burn

    Simple but advanced disc burning for macOS

    Create data discs with advanced data settings. Create video and audio discs, Burn will convert if needed. Create DVD-Video discs. Recreate discs. Burn doesn't reinvent the wheel, it uses many powerful open source Unix utilities and is also open source.
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    Downloads: 1,797 This Week
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  • 6
    A very high quality package of printer drivers for CUPS on Linux and other POSIX-compliant operating systems. This project also maintains an enhanced Print plug-in for GIMP 2.x from the same code base.
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    Downloads: 1,592 This Week
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  • 7
    deepin
    deepin is a Debian-based distribution that aims to provide an elegant, user-friendly and reliable operating system. It does not only include the best the open source world has to offer, but it has also created its own desktop environment called DDE or Deepin Desktop Environment which is based on the Qt 5 toolkit. Deepin focuses much of its attention on intuitive design. Its home-grown applications, like Deepin Software Centre, DMusic and DPlayer are tailored to the average user. Being easy to install and use, deepin can be a good Windows alternative for office and home use.
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    Downloads: 1,347 This Week
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  • 8
    USBLoaderGX

    USBLoaderGX

    Game backup loader for Wii and vWii

    USBLoaderGX is a GUI for Waninkoko's USB Loader, based on libwiigui. It allows listing and launching Wii games, Gamecube games and homebrew on Wii and WiiU vWii mode. Its interface, based on the official theme from Nintendo Wii, is easy to use and perfect for kids and all the family. ATTTENTION, THIS PROJECT IS NOT MAINTAINED HERE ANYMORE. USBLoaderGX last version on sourceforge is 1272 (last stable 1271). Any bug reports or requests posted here will be ignored. This project has been copied to github, and any developers can now update and release new versions. Newer versions are available, maintained by other developers. If you need help, want to ask any questions or want to download newer versions (1280+), then you can find a project's branch maintained by Blackb0x here: https://gbatemp.net https://gbatemp.net/posts/8856063 https://github.com/wiidev/usbloadergx Thank you for your support all these years. Cyan
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    Downloads: 1,536 This Week
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  • 9
    Smoothwall
    Smoothwall is a best-of-breed Internet firewall/router, designed to run on commodity hardware and to provide an easy-to-use administration interface to those using it. Built using open source and Free software, it's distributed under the GNU Public License.
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    Downloads: 1,710 This Week
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  • Secure Online Fax and Business Text Messaging Service Icon
    Secure Online Fax and Business Text Messaging Service

    Elevate your business communications with Notifyre's secure SMS and fax solutions.

    Send and receive SMS and fax online, from email, app or with our developer friendly SMS & fax API. HIPAA compliant & ISO 27001 certified. Outstanding value and 5-star service.
  • 10
    FreeImage is a library project for developers who would like to support popular graphics image formats (PNG, JPEG, TIFF, BMP and others). Some highlights are: extremely simple in use, not limited to the local PC (unique FreeImageIO) and Plugin driven!
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    Downloads: 1,210 This Week
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  • 11
    LXDE - Lightweight X11 Desktop Environment. This project aimed to provide a new desktop environment which is useful enough and keep resource usage lower at the same time. Useabiliy, speed, and memory usage are our main concern. Suitable for netbooks.
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    Downloads: 1,334 This Week
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  • 12

    net-tools

    Linux networking base tools

    A collection of programs that form the base set of the NET-3 networking distribution for the Linux operating system. Includes: arp, hostname, ifconfig, netstat, rarp, route, plipconfig, slattach, mii-tool and iptunnel and ipmaddr. A mirror of the sourcecode is available on https://github.com/ecki/net-tools
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    Downloads: 7,150 This Week
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  • 13
    An extremly fast and lightweight file manager which features tabbed browsing and user-friendly interface
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    Downloads: 1,373 This Week
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  • 14
    uGet - Download Manager
    uGet, the Best Download Manager for Linux. uGet is a lightweight yet powerful Open Source download manager for GNU/Linux developed with GTK+, which also comes packaged as a portable Windows app. - Quick Links - Features: https://ugetdm.com/features Screenshots: https://ugetdm.com/screenshots Blog: https://ugetdm.com/blog Support: https://ugetdm.com/qa Frequently Asked Questions (FAQs): https://ugetdm.com/qa/faq RSS Feed: https://ugetdm.com/rss GitHub: https://github.com/ugetdm GitHub: https://github.com/chhuang-one
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    Downloads: 1,181 This Week
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  • 15
    Klavaro Touch Typing Tutor

    Klavaro Touch Typing Tutor

    A very efficient tutor.

    A touch typing tutor very flexible, supporting customizable keyboard layouts. You can edit and save new or unknown keyboard layouts, as the basic course was designed to not depend on specific ones. Also, there are some charts about the learning process.
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    Downloads: 1,256 This Week
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  • 16
    AkelPad
    A simple notepad-like text editor with many features. It is designed to be a small and fast.
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    Downloads: 1,143 This Week
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  • 17
    Nikkho

    Nikkho

    Javier Gutiérrez Chamorro (Guti) Open source projects

    Javier Gutiérrez Chamorro (Guti) Open source projects Author's website: https://www.javiergutierrezchamorro.com
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    Downloads: 1,261 This Week
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  • 18
    Linux ATM Drivers for the Geos Multiport ADSL2+ router, Solos PCI Multiport ADSL2+ modem and Pulsar PCI ADSL Card
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    Downloads: 6,735 This Week
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  • 19
    Uniform Server

    Uniform Server

    A free lightweight Windows Apache MySQL and PHP Server Solution.

    Uniform Server is a free lightweight WAMP server solution for Windows. Build using a modular design approach, it includes the latest versions of Apache, MySQL or MariaDB, PHP (with version switching), phpMyAdmin or Adminer. No installation required! No registry dust! Just unpack and fire up! ------- Note: The latest version of Uniform Server requires a **64-bit version** of Windows. -------
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    Downloads: 1,086 This Week
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  • 20
    A tiny (<30K) cgi wrapper that uses a UNIX shell or a Lua VM to provide PHP-like scripting for dynamic web content. It transparently parses form data, including mime-formatted file uploads.
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    Downloads: 6,169 This Week
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  • 21

    libusb-win32

    libusb-win32 is a port of libusb-0.1 under Windows

    libusb-win32 is a port of the USB library libusb-0.1 (http://sf.net/projects/libusb/) to 32/64bit Windows. The library allows user space applications to access many USB device on Windows. Development of libusb-win32 is now at github https://github.com/mcuee/libusb-win32. Sourceforge will only be used for mailing list since Feb 2024.
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    Downloads: 6,138 This Week
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  • 22

    Privoxy

    HTTP proxy to block ads and customize webpages

    Privoxy is a non-caching web proxy with advanced filtering capabilities for enhancing privacy, modifying web page data and HTTP headers, controlling access, and removing ads and other obnoxious Internet junk. Privoxy has a flexible configuration and can be customized to suit individual needs and tastes. It has application for both stand-alone systems and multi-user networks.
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    Downloads: 1,013 This Week
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  • 23
    UltraDefrag

    UltraDefrag

    Increase your system performance with this easy to use tool

    Please note, here you can find the latest open source release of UltraDefrag (7.1.4). The most recent UltraDefrag release (12.0.0) can be found on our official website: https://ultradefrag.net UltraDefrag is a disk defragmenter for Windows, which supports defragmentation of locked system files by running during the boot process. It is easy to use without any complicated scripting or a huge load of configuration settings. You can filter the files processed by size, number of fragments, file name and path. You can terminate the process early by specifying an execution time limit.
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    Downloads: 1,082 This Week
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  • 24
    mp3splt

    mp3splt

    utility to split mp3, ogg vorbis and FLAC files without decoding

    mp3splt is a free utility to split mp3, ogg vorbis and FLAC files without decoding, selecting begin/end time; if file is an album, you can get splitpoints automatically from internet or a local cue, cddb file. It also splits Mp3Wrap and AlbumWrap archives. Supports splitting and trimming by silence detection. For mp3 files, both ID3v1 and ID3v2 are supported using original tags or user defined tags.
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    Downloads: 1,107 This Week
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  • 25
    Pidgin IM

    Pidgin IM

    A universal instant messaging (IM) program

    See https://pidgin.im/about/ for more information. Pidgin is an instant messaging program which lets you log in to accounts on multiple chat networks simultaneously. It runs on Windows, Linux, and other UNIX operating systems. Pidgin is compatible with the following chat networks out of the box: AIM, ICQ, Google Talk, Jabber/XMPP, MSN Messenger, Yahoo!, Bonjour, Gadu-Gadu, IRC, MXit, Novell GroupWise Messenger, Lotus Sametime, SILC, SIMPLE, MySpaceIM, and Zephyr. It is written in C and makes heavy use of GLib and GTK+. Finch is a command line instant messaging program. It also lets you log in to accounts on multiple chat network simultaneously, and it is compatible with the same chat networks as Pidgin. It is written in C and makes heavy use of GLib and ncurses.
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    Downloads: 5,767 This Week
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