Breaktime - Break time is an app that reminds you to stand up every chosen amount of time.
ChitterChat - Speak to 1 new person every week
Coworker Coffee - Coffee with a different coworker each week
Stealthy: Secret Messenger - Chat anonymously with friends & strangers
Serendipity - Serendipity is a PHP-powered weblog engine which gives the user an easy way to maintain a blog.
Lunchclub - Curated 1:1 professional connections