Floorplanner - Floor plan interior design software. Design your house, home, room, apartment, kitchen, bathroom, bedroom, office or classroom online for free or sell real estate better with interactive 2D and 3D floorplans.
MediaWiki - MediaWiki is a free software wiki package written in PHP, originally for use on Wikipedia.
Sweet Home 3D - Sweet Home 3D is a free interior design application that helps to draw the plan of house, arrange furniture on it and visit the results in 3D.
TiddlyWiki - a non-linear personal web notebook
SketchUp - 3D for Everyone
Confluence - Confluence is content collaboration software that changes how modern teams work