eXo Platform - Digital workplace solution
InterPals - InterPals is a friendly community of over 5 million friends, language learners, travelers and penpals.
Basecamp - A simple and elegant project management system.
PenPal World - Connect with people all over the world
Slack - A messaging app for teams who see through the Earth!
swap-bot - Swap-bot is a online service that organizes group swaps and a community of creative individuals.