20 Lesser‑Known Open‑Source Projects Powering the Tech Industry

DeepSeek Open‑Source Projects (OpenSourceWeek 2025)

FlashMLA – Optimized for NVIDIA Hopper GPUs (H100/H800). It accelerates large‑model inference, especially for variable‑length sequences. In memory‑constrained scenarios on H800 it reaches up to 3000 GB/s memory bandwidth, and in compute‑bound scenarios up to 580 TFLOPS. The source code is available at https://github.com/deepseek-ai/FlashMLA.

DeepEP – A communication library tailored for Mixture‑of‑Experts (MoE) models and Expert Parallelism. It provides high‑throughput, low‑latency fully‑connected GPU kernels for MoE dispatch and merge operations, with FP8 low‑precision support. Repository: https://github.com/deepseek-ai/DeepEP.

Other Notable Open‑Source Projects

Skynet – Lightweight C‑based distributed game‑server framework (few thousand lines) supporting high concurrency, RPC, and message queues. https://github.com/cloudwu/skynet flv.js – JavaScript library (Bilibili) for playing FLV video in HTML5 via Media Source Extensions; maintenance is winding down. https://github.com/bilibili/flv.js Tinyhttpd – Ultra‑small HTTP server (<500 LOC) used for teaching HTTP fundamentals. https://github.com/EZLippi/Tinyhttpd Memcached – High‑performance in‑memory key‑value cache for simple storage scenarios. https://github.com/memcached/memcached Redis – Versatile key‑value store with rich data structures, persistence, and messaging capabilities. https://github.com/redis/redis cJSON – Minimalist C library (~500 lines) for fast JSON parsing, widely used in embedded/IOT devices. https://github.com/DaveGamble/cJSON LevelDB – Google’s high‑performance key‑value store, employed in blockchain and distributed databases. https://github.com/google/leveldb Libevent – Asynchronous event notification library in C, underlying Nginx, Memcached, etc. https://github.com/libevent/libevent SQLite – Embedded relational database stored in a single file; ubiquitous in mobile apps and browsers. https://github.com/sqlite/sqlite OpenResty – Nginx‑based platform extended with Lua for dynamic APIs and micro‑service gateways. https://github.com/openresty/openresty MeiliSearch – Rust‑written full‑text search engine offering fast, real‑time search for modern web apps. https://github.com/meilisearch/meilisearch FreeSwitch – Open‑source telephony platform powering many Chinese call centers. https://github.com/signalwire/freeswitch ffmpeg – Comprehensive multimedia processing suite supporting a vast array of formats. https://github.com/FFmpeg/FFmpeg ImageMagick – Powerful image manipulation library handling numerous formats. https://github.com/ImageMagick/ImageMagick CEF (Chromium Embedded Framework) – C++ wrapper around Chromium for embedding a browser engine in desktop applications. https://github.com/chromiumembedded/cef OBS Studio – Free, open‑source software for video recording and live streaming. https://github.com/obsproject/obs-studio VirtualApp – Android sandbox enabling app virtualization, multi‑instance, and plugin development. https://github.com/asLody/VirtualApp VideoCrafter – AI‑driven video generation toolkit (text‑to‑video, image‑to‑video) from Tencent AI Lab and HKU. https://github.com/AILab-CVC/VideoCrafter OpenCV – Widely used computer‑vision and machine‑learning library for image/video analysis. https://github.com/opencv/opencv draw.io (diagrams.net) – Web‑based diagramming tool supporting flowcharts, UML, etc.; desktop version available. https://github.com/jgraph/drawio-desktop OpenSSL – Core cryptographic library implementing SSL/TLS and a suite of encryption algorithms.

https://github.com/openssl/openssl