Idealist - Volunteer, work, and intern job search
CAD Assistant - Open Cascade CAD Assistant is a powerful offline 3D CAD viewer and converter
Nugget - Find your perfect startup idea
STP Viewer - Free STP Viewer - free software that lets you view 3D STEP files (.stp, .step file format).
Idea Hunt - Solve specific challenges for your favorite products
Manyverse - A social network off the grid