###Ruby
| Application name | Platform | Description | Links |
|---|---|---|---|
| codedoor | Rails | CodeDoor is a marketplace for freelance programmers to find work. | Github |
| Feedbin | Rails | A fast, simple RSS reader that delivers a great reading experience. | Github |
| Holla | Rails | Holla is a group chat app. The UI is built in a RIA fashion - i.e. is totally asynchronous and super fast. | Github |
| Lobsters | Rails | HN style link aggregation site | Github |
| Loomio | Rails | Loomio is a user-friendly tool for group decision-making. | Github |
| MindMup | Sinatra | MindMup is a zero-friction mind map canvas. Our aim is to create the most productive mind mapping environment out there, removing all the distractions and providing powerful editing shortcuts. | Github |
| Monocle | Sinatra, client-side JS | Monocle is a community focused around technology and startups. | Github |
| Quill | Rails | Quill provides interactive grammar lessons. | Github |
| Sched.do | Rails | A scheduling app that is tightly integrated with Yammer. | Github |
| Sketch-a-char | Rails | Successor of Detexify. | Github |
| Brevidy | Rails | An open source video social network built with Ruby on Rails, HAML, Bootstrap, and jQuery. | Github |
| Wanderlust | Rails | A web and mobile application to help organize travel plans among multiple people. | Github |
| YumHacker | Rails | Find and share awesome restaurants! | Github Intro |
From Open Source Rails listed by "Recently Added"
| Application | Description | Links |
|---|---|---|
| Spree | Powerful and flexible e-commerce platform | Github OSR |
| Gitlab | Self hosted Git management software | Github OSR |
| Diaspora | Distributed social network | Github OSR |
| Redmine | Flexible and full featured project management application | Github OSR |
| Fat Free CRM | Simple and customizable CRM | Github OSR |
| Selfstarter | Host your own crowdfunding site for your project. | Github OSR |
| Locomotive CMS | Powerful multi-site CMS with built in integration with Heroku and Amazon. | Github OSR |
| Obtvse | A clean and simple markdown blog application, inspired by Svbtle. | Github OSR |
| Squash | Squash is a collection of tools that help engineers find and kill bugs in their code. | Github OSR |
| Errbit | Exception notifier | Github OSR |
| Fulcrum | Agile Project Management App | Github OSR |
| Kandan | Real-time Chat | Github OSR |
| Chili Project | Easy to use project management and ticketing application | Github OSR |
| Copycopter | Self hosted copywriting service | Github OSR |
| Lobsters | An awesome Hacker News alternative | Github OSR |
| Refinery CMS | Modular and extendable content management system | Github OSR |
| rStatus | A simple, open microblogging platform | Github OSR |
| Amahi | Your personal cloud and media server | Github OSR |
| Sprint App | Powerful and full featured project and time tracking | Github OSR |
| Mixture FM | The best and organized DJ mixes from around the world | Github OSR |
| Hackety Hack | Learning management system that powers Hackety.com | Github OSR |
| Discourse | Discourse is the 100% open source, next-generation discussion platform built for the next decade of the Internet | Github OSR |
| ###Python | ||
| Application name | Platform | Description |
| ------------------ | ---------- | ------------- |
| Explainshell | Python | Explain a given command-line. |
| Kite | Python/Node | Kite is an opensource replacement to Gmail. |
| MediaCrush | Python | A website for serving media super fast. |
| USV.com | Python/Tornado | USV.com community site. |
| Voicechat | Python | VoiceChat is a set of APIs to create ad-hoc conferences to be used in the browser. |
###Server JS
| Application name | Platform | Description | Links |
|---|---|---|---|
| Api Axle | Node | A free, locally hosted API management solution. A proxy for your api, statistics for your api & a powerful api of its own. | Github |
| Earth | Node | A project to visualize global weather conditions | Github |
| GuessHub | Node | Given a patch (change) taken from a GitHub commit, guess which repository it comes from. | Github |
| Kite | Python/Node | Kite is an opensource replacement to Gmail. | Github Also in |
| LogicPull | Node | LogicPull gives you the tools to quickly create advanced question and answer interviews for end-users to produce all the documents you need. | Github |
| Mixbolt | DJ tool in your browser | Github | |
| Mondrian | Web-based vector app | Github | |
| Prose | Node | A content editor for GitHub | Github |
| Reportr | Node | Your life's personal dashboard. | Github |
| Sharefest | Node | One-To-Many sharing application. Serverless. Eliminates the need to fully upload your file to services such as Dropbox or Google Drive. | Github |
| ShareLaTeX | A web-based collaborative LaTeX editor | Github along with other components | |
| Telescope | Meteor (JS) | HN clone built in Meteor | Github |
###Others
| Application name | Platform | Description | Links |
|---|---|---|---|
| Clumsy Bird | JavaScript (MelonJS) | A MelonJS port of the famous Flappy Bird Game | Github |
| Code Combat | CoffeeScript | Multiplayer programming game for learning how to code. Largest FOSS CoffeeScript codebase in production | Github |
| cozy-pfm | JavaScript | This is a Personal Finance Manager for the awesome CozyCloud project. | Github |
| Etherpad Lite | Really real-time collaborative document editing for the rest of us. | Github | |
| GetchaBooks | PHP | GetchaBooks.com is a web service that combines school textbook listings with an easy-to-use price comparison system. | Github |
| Guardian | CSS, styling | The Guardian website frontend. | Github |
| Hacker News | Arc | Hacker News web site source code mirror. | Github |
| iSICP | Static HTML | Interactive Structure and Interpretation of Computer Programs | Github |
| makrio | Source code for https://makr.io. | Github | |
| Peer.fm | Music-streaming service with unique social features and real-time syncing. | Github | |
| TuneCrawl | Plain HTML, JavaScript) | Find and play music from the most popular music streaming providers. | Github |
| PixelDo | Plain HTML, JavaScript | For 360 Deg Aerial Panoramic Photography | |
| JS Panorama Viewver | Plain HTML, JavaScript | Viewving 360 Deg Equirectangular Panorama's using three.js | [Github] (http://mrdoob.github.io/three.js/) |
| Vimulator | Static HTML, JS | A JavaScript Vim simulator for demonstrations | Github |