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

  • Simply solve complex auth. Easy for devs to set up. Easy for non-devs to use. Icon
    Simply solve complex auth. Easy for devs to set up. Easy for non-devs to use.

    Transform user access with Frontegg CIAM: login box, SSO, MFA, multi-tenancy, and 99.99% uptime.

    Custom auth drains 25% of dev time and risks 62% more breaches, stalling enterprise deals. Frontegg platform delivers a simple login box, seamless authentication (SSO, MFA, passwordless), robust multi-tenancy, and a customizable Admin Portal. Integrate fast with the React SDK, meet compliance needs, and focus on innovation.
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  • Gen AI apps are built with MongoDB Atlas Icon
    Gen AI apps are built with MongoDB Atlas

    The database for AI-powered applications.

    MongoDB Atlas is the developer-friendly database used to build, scale, and run gen AI and LLM-powered apps—without needing a separate vector database. Atlas offers built-in vector search, global availability across 115+ regions, and flexible document modeling. Start building AI apps faster, all in one place.
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  • 1
    Repeat

    Repeat

    Mouse/keyboard record/replay and automation hotkeys/macros creation

    Full-fledged mouse/keyboard record/replay and automation hotkeys/macros creation using modern programming languages, and more advanced automation features. Working across three major OSes: Windows, OSX, and Linux. See more at https://github.com/repeats/Repeat Repeat yourself with some intelligence. This, if used correctly, can improve your productivity greatly.
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    Downloads: 66 This Week
    Last Update:
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  • 2

    ATasm: 6502 cross-assembler

    ATasm is a 6502 command-line cross-assembler.

    ATasm is a 6502 command-line cross-assembler that is compatible with the original Mac/65 macro assembler released by OSS software. The aim of ATasm is to provide Atari home-brew coders with a comfortable and powerful toolset.
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    Downloads: 6 This Week
    Last Update:
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  • 3
    The ultimate text preprocessor and macro expander. Its syntax is similar to JavaScript, and gmac knows some really useful tricks. Details: http://gmac.sourceforge.net/
    Downloads: 1 This Week
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  • 4
    1664 macro assembler, simulator, console debugger, interpreter (host system calls.)
    Downloads: 0 This Week
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  • The Ultimate Quiz Maker & Engagement Platform Icon
    The Ultimate Quiz Maker & Engagement Platform

    Powering publishers, brands, and sports teams with 30+ interactive content types. Maximize engagement and revenue with Riddle.

    Riddle is an online platform for creating interactive content such as quizzes, surveys, personality tests, prediction games, and leaderboards. Our customers create content on our platform and then embed it on their website. The goal? Increased engagement, lead generation, segmentation, and content monetization - all 100% GDPR compliant.
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  • 5
    An implementation of the venerable MACRO assembler preprocessor from back in the mid 60's. It's interesting as a study of what was possible then, and how that could be useful today.
    Downloads: 0 This Week
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  • 6
    This is a C macro library for doing fixed point arithmetic.
    Downloads: 0 This Week
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  • 7
    Open Macro Library is a library of highly reusable C macros providing a set of well-designed commonly needed functionality to C developers, like logging and debugging helpers, containers, sorting and other algorithms.
    Downloads: 0 This Week
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  • 8

    UniSIMD-assembler

    SIMD macro assembler unified for ARM, MIPS, PPC and x86

    UniSIMD assembler is a high-level C/C++ macro assembler framework unified across ARM, MIPS, POWER and x86 architectures. It establishes a subset of both BASE and SIMD instruction sets with clearly defined common API, so that application logic can be written and maintained in one place without code replication. The assembler itself isn't a separate tool, but rather a collection of C/C++ header files, which applications need to include directly in order to use. At present, Intel SSE/SSE2/SSE4 and AVX/AVX2/AVX-512 (32/64-bit x86 ISAs), ARMv7 NEON/NEONv2, ARMv8 AArch32 and AArch64 NEON, SVE (32/64-bit ARM ISAs), MIPS 32/64-bit r5/r6 MSA and POWER 32/64-bit VMX/VSX (little/big-endian ISAs) are mostly implemented (/w horizontal reductions) although scalar improvements, wider SIMD vectors with zeroing/merging predicates in 3/4-operand instructions are planned as extensions to current 2/3-operand SPMD-driven vertical SIMD ISA. See README file.
    Downloads: 0 This Week
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  • 9
    A simple minimalist general purpose text macro processor
    Downloads: 0 This Week
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  • Sales CRM and Pipeline Management Software | Pipedrive Icon
    Sales CRM and Pipeline Management Software | Pipedrive

    The easy and effective CRM for closing deals

    Pipedrive’s simple interface empowers salespeople to streamline workflows and unite sales tasks in one workspace. Unlock instant sales insights with Pipedrive’s visual sales pipeline and fine-tune your strategy with robust reporting features and a personalized AI Sales Assistant.
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  • 10
    netWindow Serializer stores data contained in multiple web-browser windows automatically into a single data-file. It can also be used to recover web-browser windows in the event of system restart. Used as a file-archiving, book-marking and recovery tool.
    Downloads: 0 This Week
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  • 11
    This project provides a tool-chain for compiling C code for the SPEAR2 processor. It comprises a C compiler (GCC), an assembler/linker, a macro assembler, a basic library and a simulator.
    Downloads: 0 This Week
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  • 12
    ztex is a Firmware Kit with a corresponding Driver API for EZ-USB based hardware. The Firmware is written in C and assembled using a powerful macro processor. The Driver API allows the development of platform-independent device drivers.
    Downloads: 0 This Week
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