Coworker Coffee - Coffee with a different coworker each week
NextRetreat - All-in-one solution for organising team retreats & offsites
Serendipity - Serendipity is a PHP-powered weblog engine which gives the user an easy way to maintain a blog.
TACTIC - The world's most powerful open source asset management tool
Cuely - 1-min guided exercises to stay well all day with reminders
Offsiter - Find and book team building activities and company offsites