Tumblr - A feature rich and free blog hosting platform offering professional and fully customizable templates, bookmarklets, photos, mobile apps, and social network integration.

Unbordered - Unbordered app comes up with features to help you in finding the perfect language practice and exchange partners so you can practice foreign languages right through your mobile phone.

Soup.io - Soup is a tumblelog, a super-easy blog that can do more than just text: post links, quotes, videos...

PenPal World - Connect with people all over the world

Postly - Turn your photos into REAL beautiful postcards. Available on iPhone, iPad and Android. Make friends and family smile with a postcard!

We3 - AI that finds you the most compatible people nearby