Open Source Mac - Free Mac software, all open-source, all OS X.
BlogEngine.NET - Home
Piwik - Web analytics - Open source
OpenACS Home
Vanilla - Free, Open-Source Forum Software
A list of top (79) FREE and/or open source Mac software [Will be frequently updated] | Coder 007
Pubwich — Open-source online data aggregation PHP application
Vivvo :: News Content Management System
Open Source Cross-Browser WYSIWYG Editor
Ushahidi :: Home
ThinkUp: Social Media Insights Platform
Nonprofit Software - Social Source Commons
FlexPaper - The web based pdf viewer solution
Home » LibreOffice
Elgg - Open Source Social Networking Engine.
Kaltura: Open Source Video Developer Community | Leading the Open Video Revolution
ownCloud.org | Your Cloud, Your Data, Your Way!
Discourse
Xiphos -- Open Source Bible Study Software -- Home
COSI 'Open' Religious Technology & Tools
Church.IO - OneBody - church directory and private social network software
OneBody | ChallengePost
Church.IO - List of Open Source Church Software
Home | CouchCMS - A simple and Open-Source CMS for web designers
SourceForge.net: MsgViewer - Project Web Hosting - Open Source Software
unfoldingWord – unrestricted biblical content in every language.
Telescope: Build your own Hacker News, Reddit, or Product Hunt.
Odoo | Open Source Blogs alternative to Medium
concrete5 - Free CMS | Open Source Content Management System
Rocket.Chat