Telegram - Telegram is a messaging app with a focus on speed and security. It’s superfast, simple and free.
Mighty Networks - Mighty Networks enables entrepreneurs, organizations, and companies to create and grow a community-powered brand.
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.
Bigtent - BigTent is a web-based organization and communication portal for groups.
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.
Nabble - Nabble is a forum software that are embeddable and fully customizable with scripting language.