A comprehensive SQL interview study guide covering queries, joins, window functions, indexes, transactions, optimization and schema design, with 115 practice Q&As.xoraus
Schemathesis is a property-based API testing framework that generates test cases from OpenAPI, GraphQL and gRPC schemas, finding crashes, spec violations and stateful bugs.schemathesis
A SystemVerilog implementation of HDMI 1.4b video and audio output for FPGAs, providing a reusable module that developers can drop into their own hardware designs without licensing commercial HDMI IP.hdl-util
QtExamples is a learning repository for Qt and C++ covering GUI widgets, networking, DTK styling, IDE tips, build, and release workflows through tutorials and examples.XMuli
Apache Kvrocks is a distributed key-value NoSQL database built on RocksDB and compatible with the Redis protocol, lowering memory costs while supporting replication and clustering.apache
ownCloud Infinite Scale is a self-hosted file sync and share platform with WebDAV support, desktop and mobile clients, online office integration, and scalable single-binary deployment.owncloud
A simple Redis-backed job queue service exposing HTTP APIs for publish, consume and delete, with job TTL, delayed triggers, auto-retry, dead letters and rate limits.bitleak
A Windows system-tray utility for controlling the brightness and contrast of multiple external monitors, with scheduling, hotkeys, and DDC/CI support.xanderfrangos
Contour is a modern, GPU-accelerated terminal emulator for Windows, macOS and Linux, offering persistent daemon sessions, tabs and splits, command blocks, graphics protocols and a control API for scripting and coding agents.contour-terminal
A Python library that simplifies building terminal user interfaces with a grid layout and ready-made widgets like buttons, lists and popups, similar in spirit to Tkinter.jwlodek
A collection of practical BigQuery utilities, including migration UDFs, SQL scripts, stored procedures, views, and dashboards for data warehouse operations.GoogleCloudPlatform
Audius apps is the official monorepo for the Audius music platform, containing the web and desktop app, mobile apps, embeddable player and TypeScript SDK.AudiusProject
A Spring Boot and MyBatis-Plus backend scaffold with full Spring Security authorization, JWT login, Redis caching and a code generator, designed to pair with a Vue admin frontend.macrozheng
A Rust command-line tool for generating and manipulating MIDI files, built to brute-force produce large melody datasets with partition-aware storage. Part of the public-domain All the Music project.allthemusicllc
An efficient multi-layered caching library for .NET that stacks in-memory, file, MongoDB and Redis cache layers with background refresh, distributed locking and distributed eviction.TurnerSoftware
Lively Wallpaper is a free Windows app for animated desktop wallpapers and screensavers. It can render videos, web pages, applications and games as wallpapers, with multi-monitor support, automation controls and optional machine-learning effects.lively-community
An OBS Studio plugin that reads song information from Spotify, MPD, MPRIS, VLC and window titles, displaying the current track and lyrics in your stream.univrsal
A desktop utility that gives almost any application a Quake-style drop-down window on Windows and KDE Plasma, toggled by hotkey and aware of multi-monitor setups.flyingpie
A command-line tool for running any command on specific Node.js versions, including multiple versions in parallel, for cross-version testing and benchmarking.ehmicky
NVIDIA's open-source PyTorch toolkit for speech AI, covering ASR, TTS, and speech LLMs, built for researchers to create, customize, and deploy models.NVIDIA-NeMo
alive-progress is a Python progress-bar library with animated spinners, real-time throughput and ETA, pause/resume support, and extensive customization for terminal and notebook output.rsalmei
Parsr is a document cleaning, parsing and extraction toolchain that turns PDFs, images, DOCX and EML files into structured JSON, Markdown, CSV or text, with a Dockerized API and optional GUI.axa-group
A curated reference list of official Windows XP product keys across editions and licensing channels, kept for users who still run the legacy operating system.Fuwn
Tilemap Studio is a desktop tilemap editor for Game Boy, GBC, GBA, NDS, SNES and other retro consoles, aimed at pret disassembly and ROM hack projects.Rangi42
WineGUI is a user-friendly graphical manager for Wine on Linux, with wizards for creating Windows machines, switching Wine versions and installing common components.winegui
Sharprompt is an interactive command-line application framework for C#, providing input, password, select, multi-select, and model-based prompts with validation and customization.shibayan
codespelunker (cs) is an index-free code search CLI that parses source files to distinguish code, comments, and strings, then ranks results by relevance and complexity. It offers CLI, TUI, HTTP, and MCP interfaces.boyter
The source of Kuboard v4's bilingual documentation site, covering installation, cluster operations and MCP features for the Kubernetes management UI.eip-work
Dolt is a SQL database with Git-style version control. You can fork, clone, branch, merge and push table data, while connecting through the MySQL protocol or using its Git-like CLI.dolthub
TerminusDB is an open-source knowledge-graph database with git-like version control, supporting branching, merging, time-travel queries, GraphQL, and WOQL/Datalog.terminusdb
kubecm is a command-line kubeconfig manager for switching Kubernetes clusters and namespaces, merging config files, and selecting contexts interactively.sunny0826
A curated collection of information-technology ebooks covering AI, algorithms, programming languages, databases, networking, and more, shared for learning and non-commercial study.TienNHM
A Windows patching utility for WeChat, QQ and TIM that disables message recall by modifying local binaries, and also bundles a multi-instance launcher for WeChat.huiyadanli
A deep-learning vocal separation tool that splits songs into vocals and instrumental tracks using pretrained PyTorch models, with optional scripts for training your own separator.tsurumeso
Layr is a full-stack JavaScript/TypeScript framework that simplifies development with cross-layer component inheritance, remote method invocation, MongoDB-backed storage, routing, and authorization.layrjs
RudderStack is an open-source, developer-focused customer data platform. It collects events from apps and websites and routes them to warehouses and 90+ business tools, with a Segment-compatible API.rudderlabs
ObjectBox for Dart is an embedded NoSQL database for Flutter apps, offering fast object persistence, ACID transactions, queries and on-device vector search.objectbox
DSVPN is a dead-simple VPN that tunnels traffic over TCP using modern cryptography and a shared key. It is tiny, dependency-free and designed to work on restrictive networks with almost no configuration.jedisct1
Addax is an actively maintained open-source ETL tool and successor to Alibaba DataX. It moves data between 30+ SQL and NoSQL sources using simple JSON job configurations.wgzhao
The official Windows Package Manager client, offering a CLI and PowerShell module to discover, install and upgrade software from the Microsoft Store and community repositories.microsoft
A tun2socks utility built on the gVisor userspace TCP/IP stack that transparently routes application traffic through HTTP, SOCKS, Shadowsocks, or SSH proxies.xjasonlyu
A self-hosted document management system that organizes scanned and emailed files, with OCR, full-text search and machine-learning-assisted metadata tagging.eikek
GitHound is a command-line GitHub reconnaissance tool that combines dorks, regex matching and entropy checks to hunt for exposed API keys and credentials across public repositories, Gists and commit history.tillson
A cross-platform GUI library for Rust inspired by Elm, offering a type-safe reactive model, built-in widgets, custom widget support, and multiple rendering backends.iced-rs
HASH is an open-source, multi-tenant platform for self-building knowledge graphs and simulation, where autonomous agents grow and maintain a bitemporal graph database.hashintel
A CORS 'anywhere' proxy packaged as a Cloudflare Worker that lets browser code fetch arbitrary cross-origin URLs and read otherwise forbidden headers, deployable in minutes or usable via a demo endpoint.Zibri
A Node.js and Electron library that sends PDFs and images directly to Windows printers, with fine-grained control over pages, paper size, duplexing, and printer discovery.artiebits
TDengine is a high-performance time-series database for IoT, connected vehicles and industrial IoT, handling real-time ingestion and analysis of massive sensor data in single-node or clustered deployments.taosdata
An open-source digital audio workstation with MIDI editing, mixing, automation, chord assistance, and support for VST3, CLAP, LV2, and AU plugins.zrythm
A personal knowledge base of notes on cloud native, Linux, homelab, programming languages, music and blockchain, meant for reference and learning.ryan4yin
A comprehensive Chinese textbook and open course companion for Lee Hung-yi's deep learning lectures, with PDFs, derivations, and homework code.datawhalechina
PDF4QT is an open-source PDF toolkit for Windows and Linux, bundling a document viewer, editor, comparison and page-management applications, command-line tools and a C++/Qt PDF engine.JakubMelka
npkill scans your system for node_modules folders, shows how much space they use and lets you interactively delete them to reclaim disk space.voidcosmos
A command-line diff highlighter that recomputes changes word by word within each hunk and uses terminal colors to make subtle edits easier to spot. It reads unified diffs from stdin and can serve as a Git pager.mookid
A system that automatically parallelizes POSIX shell scripts, using a preprocessor, compiler and JIT runtime to speed up data-processing pipelines.binpash