ForumFree - ForumFree allows you to create a forum or a blog in a few simple steps.
Telegram - Telegram is a messaging app with a focus on speed and security. It’s superfast, simple and free.
Forumotion.com - Create a free forum : free forum hosting, free forum skins, templates editing, chatbox, RPG mod... Choose PhpBB 2 - 3, Invision or PunBB. Create forums now!
Influitive - Influitive helps companies increase customer lifetime value and accelerate sales with the power of their own customer advocates. Inspire your customers to stay longer, share their experiences, and attract new business.
Proboards - ProBoards is a host of free forums with customer service.
Trello - Infinitely flexible. Incredibly easy to use. Great mobile apps. It's free. Trello keeps track of everything, from the big picture to the minute details.