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Best Open Source server Libraries

A curated list of the most popular GitHub repositories tagged with server. Select any project to visualize its architecture and dive into the codebase using RepoMind's AI engine.

#1gin-gonic/gin

Gin is a high-performance HTTP web framework written in Go. It provides a Martini-like API but with significantly better performance—up to 40 times faster—thanks to httprouter. Gin is designed for building REST APIs, web applications, and microservices.

88,140Go
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#2expressjs/express

Fast, unopinionated, minimalist web framework for node.

68,789JavaScript
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#3withastro/astro

The web framework for content-driven websites. ⭐️ Star to support our work!

57,000TypeScript
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#4coollabsio/coolify

An open-source, self-hostable PaaS alternative to Vercel, Heroku & Netlify that lets you easily deploy static sites, databases, full-stack applications and 280+ one-click services on your own servers.

50,893PHP
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#5PostgREST/postgrest

REST API for any Postgres database

26,550Haskell
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#6vapor/vapor

💧 A server-side Swift HTTP web framework.

25,977Swift
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#7imthenachoman/How-To-Secure-A-Linux-Server

An evolving how-to guide for securing a Linux server.

24,584
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#8valeriansaliou/sonic

🦔 Fast, lightweight & schema-less search backend. An alternative to Elasticsearch that runs on a few MBs of RAM.

21,138Rust
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#9http-party/http-server

A simple, zero-configuration, command-line http server

14,160JavaScript
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#10coturn/coturn

coturn TURN server project

13,638C
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#11Billionmail/BillionMail

BillionMail gives you open-source MailServer, NewsLetter, Email Marketing — fully self-hosted, dev-friendly, and free from monthly fees. Join the discord: https://discord.gg/asfXzBUhZr

13,543Go
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#12JoeanAmier/TikTokDownloader

TikTok 发布/喜欢/合辑/直播/视频/图集/音乐；抖音发布/喜欢/收藏/收藏夹/视频/图集/实况/直播/音乐/合集/评论/账号/搜索/热榜数据采集工具/下载工具

13,218Python
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#13googleapis/genai-toolbox

MCP Toolbox for Databases is an open source MCP server for databases.

13,113Go
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#14FlareSolverr/FlareSolverr

Proxy server to bypass Cloudflare protection

12,644Python
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#15google/go-cloud

The Go Cloud Development Kit (Go CDK): A library and tools for open cloud development in Go.

9,865Go
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#16egametang/ET

Unity3D Client And C# Server Framework

9,672C#
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#17linuxserver/Heimdall

An Application dashboard and launcher

9,014PHP
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#18yuesong-feng/30dayMakeCppServer

30天自制C++服务器，包含教程和源代码

7,000C++
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#19vespa-engine/vespa

AI + Data, online. https://vespa.ai

6,789Java
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#20sj26/mailcatcher

Catches mail and serves it through a dream.

6,727Ruby
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#21processone/ejabberd

Robust, Ubiquitous and Massively Scalable Messaging Platform (XMPP, MQTT, SIP Server)

6,569Erlang
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