Wiki - Apps Rating

ClearWiki is feature rich, yet extremely intuitive and easy to use. While most wikis have no inherent structure, ClearWiki has structured content. Your data is stored in its own unique database, enhancing your security. Secure all your traffic with HTTPS encryption. A backup option lets you download an archive of your wiki.

MediaWiki is a popular free web-based wiki software application. Developed by the Wikimedia Foundation, it is used to run all of its projects, including Wikipedia, Wiktionary and Wikinews. It is written in the PHP programming language and uses a backend database.

Unlike normal wikis, which suffer from user apathy and confusion, OpenTeams is intuitive for non-techies to learn and use. Its simple email-like interface makes it easy to create, organize, and navigate content while transparently tracking changes. This dramatically shrinks the learning curve and ensures adoption while ramping up productivity, payback, and employee engagement.

Wikidot.com is a free hosted wiki. Provides professional wiki publishing, collaboration and communication solutions with lots of features

Wikispaces is a hosting service (sometimes called a wiki farm). Private wikis with advanced features for businesses, non-profits and educators are available for an annual fee.

ProjectForum is professional wiki collaboration server software that is powerful, affordable and easy-to-use.

Versionate is a hosted wiki that is easy to use. It works well with various business document formats such as Word, PDF, etc. It's wiki made simple.

Uhuroo provides a refreshing simple approach to improve information sharing between people working together on any Group Initiative. Uhuroo encourages users to continue using their standard communication tools (like email,IM, etc) and still ensures capture of knowledge. It also allows this knowledge to be easily referenced in the future.

Free blog and free wiki in 1 single place with private and public access.

Protonotes are notes that you add to your prototype that allow project team members to discuss system functionality , design, and requirements directly on the prototype. You can think of it like a discussion board/wiki in direct context of your prototype.