Open Source C Software
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C Software
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.
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gnuplot
A portable, multi-platform, command-line driven graphing utility
A famous scientific plotting package, features include 2D and 3D plotting, a huge number of output formats, interactive input or script-driven options, and a large set of scripted examples. -
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VICE
Versatile Commodore Emulator
VICE is an emulator collection which emulates the C64, the C64-DTV, the C128, the VIC20, practically all PET models, the PLUS4 and the CBM-II (aka C610). It runs on Unix, MS-DOS, Win32, OS/2, Acorn RISC OS, BeOS, QNX 6.x, Amiga, GP2X or Mac OS X machines. -
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Frame3DD
Static and Dynamic Structural Analysis of 2D and 3D frames.
FRAME3DD is a program for the static and dynamic structural analysis of two- and three-dimensional frames and trusses with elastic and geometric stiffness. -
The All-in-One Commerce Platform for Businesses - ShopifyShopify is a leading all-in-one commerce platform that enables businesses to start, build, and grow their online and physical stores. It offers tools to create customized websites, manage inventory, process payments, and sell across multiple channels including online, in-person, wholesale, and global markets. The platform includes integrated marketing tools, analytics, and customer engagement features to help merchants reach and retain customers. Shopify supports thousands of third-party apps and offers developer-friendly APIs for custom solutions. With world-class checkout technology, Shopify powers over 150 million high-intent shoppers worldwide. Its reliable, scalable infrastructure ensures fast performance and seamless operations at any business size.
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Agena
Agena is an interpreted procedural programming language.
Agena is an easy-to-learn procedural programming language designed for science, scripting, and many other applications. Binaries are available for Windows, Linux, Solaris, OS/2, Mac OS X, Raspberry Pi and DOS. -
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ACME Cross-Assembler
multi-platform cross assembler for 6502/6510/65816 cpu
ACME is a free cross assembler released under the GNU GPL. It can produce code for the following processors: 6502, 6510 (including illegal opcodes), 65c02 and 65816. ACME supports the standard assembler stuff like global/local/anonymous labels, offset assembly, conditional assembly and looping assembly. It can include other source files as well as binaries while assembling. Calculations can be done in integer or float mode. Oh, and it is fast. -
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A graphical web browser with an emphasis on security, performance, and portability.
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basE91 is an advanced method for encoding binary data as ASCII characters. It is similar to UUencode or base64, but is more efficient. The overhead produced by basE91 depends on the input data. It amounts at most to 23% and can range down to 14%.
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belofte chess
A promising chess program
A console/text based chess program with XBoard/CECP and UCI API, available on all major platforms. You may need a graphical chess interface to use it. Please refer to README.md in the files section for installation instructions. The last stable release is 2.1.9 and has been released on 19/08/2025. Belofte 0.2.0 till 0.9.20 (c/c++): Xboard 1 & 2 (CECP) - Linux/Unix/(Windows) Belofte 2.1.1 and up (c++11) : UCI and Xboard 2 - Linux/Windows/Mac/Android/... For access to code, please clone the git repository. Compiles and Runs on 32/64 bit on Windows, Mac, Linux, Android (ARM/x86) and Raspberry. Released under GNU v2 license. (means free to copy, free to modify, free to use, ...) Works fine with Arena/Cutechess/BanksiaGui/Winboard/Xboard/... -
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Cross-platform. Very smooth sound. Works with or without Allegro. Current releases play IT/XM/S3M/MOD. In the future: create DUHs. Main advantage over IT: design your own filters, synthesis and more! Click 'Home Page' above for details.
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PSID64
Convert PSID and RSID files into C64 executables
PSID64 is a program that converts PSID and RSID files into C64 executables. This allows users to play PSID and RSID files (originally used by the PlaySID program) on a real Commodore 64 computer or emulator such as VICE. -
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Kraptor - Shoot 'em up scroller game
Kraptor is a classic shoot 'em up scroller game
Kraptor is a classic shoot 'em up scroller game, where you must fight against tons of bad dudes. This is a full game with massive destruction, powerful weapons, and high speed action in varied levels. Works for Linux, DOS, Windows, QNX, Mac Os, etc.. -
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libTiMidity is a MIDI to WAVE converter library that uses Gravis Ultrasound-compatible patch files to generate digital audio data from General MIDI files. This library based on the TiMidity decoder from SDL_sound library.
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The netboot project allows booting a diskless PC over a TCP/IP based network using standard protocols like BOOTP, DHCP and TFTP. It is able to boot Linux, FreeBSD, multiple DOS variants (including MS-DOS, PC-DOS, PTS-DOS, OpenDOS, NovellDOS, FreeDOS)
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TinyTcl is a tiny version of Tcl, for small footprint machines and embeddable/rommable applications. It is derived from Tcl 6.7 and compiles to less than 60K, 10X smaller than Tcl 7 and Tcl 8.
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Almake
makefile scripts and templates for Allegro 4 game library
This is a group of makefile scripts and templates that helps the developer and end-user to configure, update, and build Allegro/AllegroGL/etc projects, on many platforms, and with different compilers, in a easy way (just type "make" and it will work). -
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Circuit simulator SPECI-SPICE
Circuit simulators like SPICE for low memory computers
SPECI-SPICE is a subset of SPICE intended to run on low powered computers like Amstrad CPC, ZX Spectrum, CP/M machines, old PC machines, some programmable calculators,etc. by keeping most important functionality of SPICE 2. -
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Fortune displays random text messages that are intended to be fun. It uses the original fortune-mod text database, but has a user-friendly interface. You can download versions for Dos, Windows, Linux and a Java-version for any OS.
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( pro ping )pinger network alert monitor
Pinger alert, STATICTICAL TABLES, send EMAILs or SMS by SMS GATEWAY
Thank you for your DONATIONS for Pinger alert, STATICTICAL TABLES, send EMAILs or SMS by SMS GATEWAY. Look on the tab files, select and download the version of the operating system that you need of this slight textual code that requires no system update. Network monitoring analyzer, network scanner with ping, traceroute and beeper alert and warning mail sender. Capable of scanning IP INFINIT, automatic detection of the source of network interruptions without GUI interface configurations. More, it is designed for the computer technician who carries a powerful tool in the USB key. In addition, an audible alarm warns you via Telnet or SSH terminal, a log files recorded can be used to convey specific information to the system administrator. It is comes with a configurable for warning by email. lightweight code, coming with the source files, written in C, Email warning sender, ANDROID ping, SPARC, AMD64, traceroute, DETECT SOURCE Downs, Warning by Email, C language -
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MegaZeux (MZX) is a simple but powerful game creation system. It currently officially builds on Windows (9x, 2k, XP), Linux (multiplatform), and MacOS X. Versions prior to 2.80 are available only for MS-DOS.
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BASIC interpreter for the standard (SUS) character screen handling library, which fully corresponds to the Tiny BASIC standard. The code is thread-safe and can be embedded into other code. Can be used as a game or a minimalist challenge.
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ArdReil is a multiplayer, multiplatform, networked strategy game of galactic conquest and resource management, providing opportunities for diplomacy, betrayal, cunning, and cooperation. Unite the Galaxy - preferably under your own flag.
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A quick-and-dirty maze game written in pure text-mode C with an available SDL frontend. Find the goal and make it to the exit.
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ISOLabel
Change volume label on ISO 9660 image and Joliet extension
isolabel is a program that allows you to change volume label in ISO 9660 image file after it was already created. Moreover, you can specify ISO 9660 and Joliet volume label separately, taking advantage of fancy names in Joliet together with simpler, but longer name in ISO 9660; something that tools like mkisofs/genisoimage does not allow you to do in standard compliant way. This program is written to have minimal software dependency, and work on all platforms.