Higher Logic - Private, secure online communities that stimulate conversation and ignite engagement.

Google Docs - Create a new document and edit with others at the same time -- from your computer, phone or tablet. Get stuff done with or without an internet connection. Use Docs to edit Word files. Free from Google.

Tribe.so - Tribe is a white-label platform, empowering the new generation of online communities.

Adobe Acrobat DC - Make your job easier with Adobe Acrobat DC, the trusted PDF creator. Use Acrobat to convert, edit and sign PDF files at your desk or on the go.

Discourse - Discourse is an open source discussion platform built for the next decade of the Internet.

Wondershare PDFelement - All-in-one PDF editor