Coworker Coffee - Coffee with a different coworker each week
Lunchclub - Curated 1:1 professional connections
Serendipity - Serendipity is a PHP-powered weblog engine which gives the user an easy way to maintain a blog.
Cuely - 1-min guided exercises to stay well all day with reminders
Lunch Roulette - Collaboration by grouping coworkers randomly for lunch.
Founders Cafe - Co-work with Founders from Stanford, YC, Harvard