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Learn how to design large-scale systems. Prep for the system design interview. Includes Anki flashcards.

Python 334,518 54,297 Updated Nov 3, 2025

All Algorithms implemented in Python

Python 217,473 50,015 Updated Feb 2, 2026

A collection of useful .gitignore templates

172,282 82,865 Updated Jan 23, 2026

Master the command line, in one page

159,757 14,765 Updated Jun 25, 2024

A collection of various awesome lists for hackers, pentesters and security researchers

106,064 9,968 Updated Jan 18, 2025

A list of useful payloads and bypass for Web Application Security and Pentest/CTF

Python 74,966 16,597 Updated Feb 2, 2026

Hunt down social media accounts by username across social networks

Python 72,480 8,588 Updated Feb 6, 2026

Fast and extensible multi-platform HTTP/1-2-3 web server with automatic HTTPS

Go 69,656 4,619 Updated Feb 5, 2026

A curated list of awesome C++ (or C) frameworks, libraries, resources, and shiny things. Inspired by awesome-... stuff.

69,563 8,220 Updated Jan 27, 2026

SecLists is the security tester's companion. It's a collection of multiple types of lists used during security assessments, collected in one place. List types include usernames, passwords, URLs, se…

PHP 68,622 24,894 Updated Feb 5, 2026

Ghidra is a software reverse engineering (SRE) framework

Java 64,120 7,118 Updated Feb 4, 2026

📚 Collaborative cheatsheets for console commands

Markdown 61,118 5,069 Updated Feb 6, 2026

🔍 A Hex Editor for Reverse Engineers, Programmers and people who value their retinas when working at 3 AM.

C++ 52,535 2,337 Updated Feb 1, 2026

Distributed reliable key-value store for the most critical data of a distributed system

Go 51,462 10,312 Updated Feb 6, 2026

An open-source user mode debugger for Windows. Optimized for reverse engineering and malware analysis.

C++ 47,689 2,667 Updated Feb 4, 2026

The Secure CommsOS™ for mission-critical operations

TypeScript 44,513 13,117 Updated Feb 6, 2026

Flight rules for git

42,495 3,197 Updated Oct 27, 2025

the only cheat sheet you need

Python 40,872 1,899 Updated Dec 23, 2025

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 40,605 7,051 Updated Feb 5, 2026

The Cyber Swiss Army Knife - a web app for encryption, encoding, compression and data analysis

JavaScript 33,970 3,840 Updated Feb 6, 2026

The original sources of MS-DOS 1.25, 2.0, and 4.0 for reference purposes

Assembly 31,723 4,547 Updated Apr 25, 2024

The OWASP Cheat Sheet Series was created to provide a concise collection of high value information on specific application security topics.

Python 31,302 4,363 Updated Feb 5, 2026

Windows Calculator: A simple yet powerful calculator that ships with Windows

C++ 30,853 5,706 Updated Dec 24, 2025

🔒 Consolidating and extending hosts files from several well-curated sources. Optionally pick extensions for porn, social media, and other categories.

Python 29,767 2,386 Updated Feb 4, 2026

Distributed Task Queue (development branch)

Python 27,975 4,938 Updated Feb 4, 2026

Nuclei is a fast, customizable vulnerability scanner powered by the global security community and built on a simple YAML-based DSL, enabling collaboration to tackle trending vulnerabilities on the …

Go 26,904 3,103 Updated Feb 5, 2026

World's fastest and most advanced password recovery utility

C 25,344 3,357 Updated Nov 20, 2025

😱 A curated list of amazingly awesome OSINT

24,669 3,408 Updated Feb 4, 2026

A curated list of amazingly awesome open source sysadmin resources inspired by Awesome PHP.

24,229 2,889 Updated Mar 26, 2024

🔒 A compiled checklist of 300+ tips for protecting digital security and privacy in 2024

TypeScript 20,678 1,419 Updated Jun 28, 2025
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