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
Coworker Coffee - Coffee with a different coworker each week
Virus Cafe - Make a friend in 2 minutes
Startup Quote - Awesome founders provide wisdom about making things
ChitterChat - Speak to 1 new person every week