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369 stars written in C
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Linux kernel source tree

C 228,049 61,525 Updated Apr 11, 2026

A new bootable USB solution.

C 75,777 4,752 Updated Apr 5, 2026

A command line tool and library for transferring data with URL syntax, supporting DICT, FILE, FTP, FTPS, GOPHER, GOPHERS, HTTP, HTTPS, IMAP, IMAPS, LDAP, LDAPS, MQTT, MQTTS, POP3, POP3S, RTMP, RTMP…

C 41,264 7,123 Updated Apr 11, 2026

The PHP Interpreter

C 39,992 8,023 Updated Apr 11, 2026

🎥 Command line media player

C 34,756 3,279 Updated Apr 10, 2026

Lean's LEDE source

C 31,403 19,416 Updated Apr 11, 2026

TLS/SSL and crypto library

C 29,907 11,183 Updated Apr 11, 2026

The official NGINX Open Source repository.

C 29,897 7,840 Updated Apr 7, 2026

A code-searching tool similar to ack, but faster.

C 27,105 1,440 Updated Jun 16, 2024

TCP port scanner, spews SYN packets asynchronously, scanning entire Internet in under 5 minutes.

C 25,504 3,198 Updated Mar 31, 2026

BCC - Tools for BPF-based Linux IO analysis, networking, monitoring, and more

C 22,337 4,045 Updated Mar 31, 2026

MicroPython - a lean and efficient Python implementation for microcontrollers and constrained systems

C 21,609 8,792 Updated Apr 10, 2026

A little tool to play with Windows security

C 21,391 4,058 Updated Apr 11, 2026

Sandboxie Plus & Classic

C 18,052 1,951 Updated Apr 11, 2026

A free Windows-compatible Operating System

C 17,378 2,091 Updated Apr 11, 2026

Capturing SSL/TLS plaintext without a CA certificate using eBPF. Supported on Linux/Android kernels for amd64/arm64.

C 15,101 1,606 Updated Apr 8, 2026

Affordable WiFi hacking platform for testing and learning

C 14,714 2,758 Updated Aug 14, 2024

A free, powerful, multi-purpose tool that helps you monitor system resources, debug software and detect malware. Brought to you by Winsider Seminars & Solutions, Inc. @ http://www.windows-internals…

C 13,904 1,631 Updated Apr 11, 2026

OpenVPN is an open source VPN daemon

C 13,503 3,283 Updated Apr 11, 2026

Official QEMU mirror. Please see https://www.qemu.org/contribute/ for how to submit changes to QEMU. Pull Requests are disabled. Please only use release tarballs from the QEMU website.

C 12,970 6,683 Updated Apr 9, 2026

John the Ripper jumbo - advanced offline password cracker, which supports hundreds of hash and cipher types, and runs on many operating systems, CPUs, GPUs, and even some FPGAs

C 12,968 2,471 Updated Apr 9, 2026

Kernel source tree for Raspberry Pi-provided kernel builds. Issues unrelated to the linux kernel should be posted on the community forum at https://forums.raspberrypi.com/

C 12,757 5,384 Updated Apr 10, 2026

mimalloc is a compact general purpose allocator with excellent performance.

C 12,708 1,081 Updated Apr 11, 2026

Embedded web server, with TCP/IP network stack, MQTT and Websocket

C 12,681 2,899 Updated Apr 9, 2026

Nmap - the Network Mapper. Github mirror of official SVN repository.

C 12,676 2,791 Updated Apr 9, 2026

Ultralightweight JSON parser in ANSI C

C 12,585 3,466 Updated Apr 9, 2026

RT-Thread is an open source IoT Real-Time Operating System (RTOS). https://rt-thread.github.io/rt-thread/

C 11,885 5,378 Updated Apr 9, 2026

Event notification library

C 11,857 3,466 Updated Apr 1, 2026

Small and highly portable detection tests based on MITRE's ATT&CK.

C 11,791 3,098 Updated Apr 6, 2026

Eclipse Mosquitto - An open source MQTT broker

C 10,791 2,600 Updated Mar 18, 2026
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