pegboard is a social bookmarking service that lets you save, search, share and tag your bookmarks with people all over the world!
The OpenGov initiative has spawned "ExpertNet" that is in feedback from public on planning stage as a wiki.
"Have documents the world needs to see?" Wikileaks lets you post "leaked" documents. They're only accessible via IP right now as US, China, & Thailand are all censoring them.
A wiki for a map of the world.
A wiki with seemingly endless plugins and features
Another PHP/MySQL wiki solution
Wiki software. PHP, mysql, et. al
High-grainularity, with DB, flat, etc support.
A php wiki (with db)
Textfile-based PHP wiki software
powered by Ruby on Rails and TiddlyWiki
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