1. JotSpot
    • Why We Like It Web-hosted service is a cinch to launch, with templates for managing meetings, directories, and client relationships.

    • Cool Extras JotSpot Tracker turns your wiki into an interactive spreadsheet and lets you get rid of Excel.

    • Price First five users are free; after that, $9 to $250 a month, depending on the number of users.

  2. Socialtext
    • Why We Like It Lots of options--from an inexpensive hosted service to an enterprise system with its own Dell server.

    • Cool Extras A free open-source version encourages users to fix bugs and add features.

    • Price Hosted version costs $495 per year for five users; $10 a month for each additional user. Enterprise system has a $9,995 start-up fee.

  3. PmWiki
    • Why We Like It It's the true open-source alternative. It takes some tech smarts to use, but once you've downloaded the software, it's totally customizable.

    • Cool Extras A far-flung community of developers is constantly adding new features, such as an easy-to-use control panel.

    • Price Free.