Why I Use 
This website has had several incarnations. First, it was hand-crafted web pages. That was a pain; so I based this website on GeekLog. But, I'm not really consistent at blogging (which was it's main focus … it may have evolved by now), so I switched to TikiWiki. Finally, in late summer 2006 I decided to go with PmWiki.
Why, you might ask, have I settled on PmWiki? Here are some of my reasons for selecting PmWiki:
- It uses simple text files to store the wiki content (i.e., as opposed to using a database like MySQL)
- It is written in PHP (I understand PHP)
- The PmWiki Philosophy
- It is easy to install
- It is very easy to upgrade even after customizing / personalization
- It is very easy to customize
- It does not come with a huge bundle of features I don’t want
- There are a huge bunch of add-ons that I can pick and choose from
- If none of the add-ons do what I want, it is easy (for a PHP programmer) to add or extend functionality
- Of course, because it’s free (both in cost and license philosophy) and open source
- Simple but effective authorization mechanism
- Very active user community (pmwiki-users email list)
- Very active, responsive, helpful, friendly author
By the way, I found out about PmWiki at wikimatrix.org by using their “Choice Wizard”.