CleanTimeline - Your Twitter timeline without any distractions or ads
PenPal World - Connect with people all over the world
Typefully - Write & publish great tweets, without distractions
InterPals - InterPals is a friendly community of over 5 million friends, language learners, travelers and penpals.
Shipstreams - A list of makers shipping live
Polyglot Club - Polyglot Club is a new social network for language learners.