Gridbox - Create beautiful landing pages in seconds.
OpenToonz - OpenToonz is an animation program that is a free software version of Toonz, the animation software...
SitePM - Creating and designing websites easier than ever before using the powerful features of SitePM. SitePM is a web content management system (WCMS) offered as a Software as a Service model.
Synfig Studio - Just another WordPress site
Snappykit - New way of creating websites for mobile apps.
Blender - Blender is the open source, cross platform suite of tools for 3D creation.