title: A single page wiki
body: <p>Do there exist any single page wikis?  i.e. a single wiki.php that a user can log into and edit the text of knowing that there is revision history, the ability to roll back, and all the other benefits of wiki systems without the overhead of full system.  If it stores data in a local flat file, that's fine.</p>
  
  <p>tiddlywiki and wikionastick don't do this because they must be edited locally <em>and</em> don't have revision history.</p>