Lunchclub - Curated 1:1 professional connections
Berkanan - Chat with people nearby. Even offline, on an ✈️.
Serendipity - Serendipity is a PHP-powered weblog engine which gives the user an easy way to maintain a blog.
Bubi Chat - Location based anonymous chatting app
Lunch Roulette - Collaboration by grouping coworkers randomly for lunch.
Vuash - Send secret messages safely.