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

  • Find Hidden Risks in Windows Task Scheduler Icon
    Find Hidden Risks in Windows Task Scheduler

    Free diagnostic script reveals configuration issues, error patterns, and security risks. Instant HTML report.

    Windows Task Scheduler might be hiding critical failures. Download the free JAMS diagnostic tool to uncover problems before they impact production—get a color-coded risk report with clear remediation steps in minutes.
    Download Free Tool
  • Retool your internal operations Icon
    Retool your internal operations

    Generate secure, production-grade apps that connect to your business data. Not just prototypes, but tools your team can actually deploy.

    Build internal software that meets enterprise security standards without waiting on engineering resources. Retool connects to your databases, APIs, and data sources while maintaining the permissions and controls you need. Create custom dashboards, admin tools, and workflows from natural language prompts—all deployed in your cloud with security baked in. Stop duct-taping operations together, start building in Retool.
    Build an app in Retool
  • 1
    VTun is the easiest way to create Virtual Tunnels over TCP/IP networks with traffic shaping, compression, and encryption. It supports IP, Ethernet, PPP and other tunnel types. VTun is easily and highly configurable. VPN, Mobile IP, Shaping, etc
    Leader badge
    Downloads: 5,207 This Week
    Last Update:
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  • 2
    IPCop Firewall

    IPCop Firewall

    Linux firewall distribution geared towards home and SOHO users.

    The IPCop Firewall is a Linux firewall distribution. It is geared towards home and SOHO users. The IPCop web-interface is very user-friendly and makes usage easy.
    Leader badge
    Downloads: 203 This Week
    Last Update:
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  • 3
    CoRD
    CoRD is a Mac OS X remote desktop client for Windows servers running Microsoft Remote Desktop or Terminal Services.
    Downloads: 183 This Week
    Last Update:
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  • 4
    FreeOTFE

    FreeOTFE

    A free "on-the-fly" transparent disk encryption program for PC & PDAs.

    An upstream source site housing the original files for this mirror is no longer available. With this software, you can create one or more "virtual disks" on your PC/PDA. These disks operate exactly like a normal disk, with the exception that anything written to one of them is transparently, and securely, encrypted before being stored on your computer's hard drive.
    Downloads: 18 This Week
    Last Update:
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  • Atera all-in-one platform IT management software with AI agents Icon
    Atera all-in-one platform IT management software with AI agents

    Ideal for internal IT departments or managed service providers (MSPs)

    Atera’s AI agents don’t just assist, they act. From detection to resolution, they handle incidents and requests instantly, taking your IT management from automated to autonomous.
    Learn More
  • 5
    Awdbedit is a BIOS editor for Award BIOSes. It supports unpacking, replacing, and repacking of components within a BIOS image, and allows settings to be changed and tweaks to be applied to the actual BIOS itself.
    Downloads: 78 This Week
    Last Update:
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  • 6
    JauntePE
    Windows portable app maker: launcher(s), runtime, and gui designed to help you run non-portable applications in a portable manner.
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    Downloads: 54 This Week
    Last Update:
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  • 7
    OpenL2TP is an L2TP client/server written specifically for Linux. It has been designed for use as an enterprise L2TP VPN server or for use in commercial, Linux-based, embedded networking products.
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    Downloads: 52 This Week
    Last Update:
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  • 8
    The Hewlett-Packard Co. Linux Inkjet Driver Project has moved!
    Downloads: 13 This Week
    Last Update:
    See Project
  • 9

    Win86emu

    x86 emulator for Windows RT

    This allows Windows RT to run x86 binaries. Works only on jailbroken devices.
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    Downloads: 18 This Week
    Last Update:
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  • Financial reporting cloud-based software. Icon
    Financial reporting cloud-based software.

    For companies looking to automate their consolidation and financial statement function

    The software is cloud based and automates complexities around consolidating and reporting for groups with multiple year ends, currencies and ERP systems with a slice and dice approach to reporting. While retaining the structure, control and validation needed in a financial reporting tool, we’ve managed to keep things flexible.
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  • 10
    An easy to use Development Environment for OS developers to design, write, compile, test, and publish new or existing OS projects with ease.
    Leader badge
    Downloads: 30 This Week
    Last Update:
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  • 11
    This project aims to pool together as many kernel projects as possible, ironing out conflicts where possible, so that experimental kernel projects can get greater exposure, safely, and so that those projects can be tested under much more varied conditions
    Downloads: 8 This Week
    Last Update:
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  • 12
    dvd2xbox is a DVD/CD-R to hdd copy program for the xbox which supports the formats UDF/ISO9660/CDDA (Audio 2 Ogg ripping with freecddb naming, dvd ripping with libdvdread). It provides a simple all at once copy mode and a win commander style disc browser
    Downloads: 8 This Week
    Last Update:
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  • 13
    AutoInstaller is a program which can install and uninstall programs based on the decision of plug-ins. These could include by schedule, at user demand, or a more complex scenario. It uses plug-ins to handle tar.gz, tgz, zip, and rpm files.
    Downloads: 6 This Week
    Last Update:
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  • 14
    RAT (Remote Assistance Tool) is a Java Application designed for end user support and remote desktop control based on VNC. It is useable through nat devices and firewalls by connecting the communication end partners through a proxy server.
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    Downloads: 6 This Week
    Last Update:
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  • 15
    Open1X is an open source implementation of the IEEE 802.1X protocol. This project includes support for the supplicant, while other projects (e.g., FreeRADIUS) provide support for the authentication server.
    Downloads: 1 This Week
    Last Update:
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  • 16
    Java access to USB, currently using kernel 2.4 Linux-USB support. There is a "core" API for accessing USB devices, and simple tools including a USB viewer in Swing. Applications are being developed separately, including digital camera support.
    Downloads: 5 This Week
    Last Update:
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  • 17
    An implementation of the Ext2 (Linux) filesystem for Mac OS X.
    Downloads: 3 This Week
    Last Update:
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  • 18

    Demos Commander

    This project has moved to Github

    A clone of Norton Commander for Unix. Text-based, full featured file manager intuitive interface. https://github.com/sergev/deco
    Downloads: 3 This Week
    Last Update:
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  • 19
    This utility is used to manipulate Minix filesystem images in user-space. It can be used to extract files and generate full images for using in embedded system and/or Linux init ram disks.
    Downloads: 3 This Week
    Last Update:
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  • 20
    mtrace is a multicast traceroute utility, which traces, with the help of the routers along the way, the path from a multicast receiver to a multicast source.
    Downloads: 3 This Week
    Last Update:
    See Project
  • 21
    The Legacy Ralink drivers have permanently been deprecated in favor of the in-kernel rt2x00 drivers. See http://rt2x00.serialmonkey.com for the rt2x00 project website.
    Downloads: 3 This Week
    Last Update:
    See Project
  • 22

    FreeOSEK RTOS

    Project has been move to https://github.com/ciaa/Firmware

    The project is not more active, we have fix a lot of issue and perform many improvements. These are now deliverd as part of a new project: https://github.com/ciaa/Firmware ---- FreeOSEK is a scalable solution for embedded system. FreeOSEK OS is based on OSEK RTOS specification (OSEK-VDX). visit us in: http://opensek.sourceforge.net
    Leader badge
    Downloads: 1 This Week
    Last Update:
    See Project
  • 23
    - DSI is a security framework addressing security needs of carrier-grade Linux clusters. - DigSig is a linux kernel module checking RSA signatures of ELF executables at run-time. **Those projects are no longer maintained**
    Downloads: 2 This Week
    Last Update:
    See Project
  • 24
    ** Note: This projected has been halted. Please join #lg4l @ irc.freenode.net for more info.** A system of libraries and utilities to operate the Logitech G19 Gaming keyboard in linux and related operating systems.
    Downloads: 2 This Week
    Last Update:
    See Project
  • 25
    A Layer 2 Tunneling Protocol VPN client/daemon for Linux and other POSIX-based OSs.
    Downloads: 2 This Week
    Last Update:
    See Project
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