Batflat - Lightweight, fast, easy, and free CMS.
uberflip - Organize and Centralize ALL of your Content in minutes
Shopping feed - Shopping feed is a versatile eCommerce application that allows eCommerce stores to thousands of channels.
CoSchedule - CoSchedule is the #1 marketing calendar that helps you stay organized and get sh*t done. Plan, produce, publish and promote your content.
ImpressPages CMS - ImpressPages is a PHP framework with admin panel.
Embedly - Embedly helps publishers and consumers manage embed codes from websites and APIs.