After a serious amount of work, Friki the popular and lightweight Java "wiki" application has emerged from a major internal rewrite, and is now in "beta". http://sourceforge.net/projects/friki
Key changes include:
+ the most flexible "wiki translator" available, where all transformations can be modified, added or removed without rebuild.
+ incredibly simple installation: drop in a war file, the first time it runs it will ask one question, and it's running.
+ fully i18n-friendly. All visible text may be customized after deployment without a rebuild, including URLs and buttons, all pages are stored, processed and presented in unicode.
+ single-click view of page differences since the last edit.
+ all this in a 160k war file - no multimegabyte downloads here.
Please check out the beta, and have your say in where we go next.