Ema Personal Wiki is a cloud-synchronized notebook with linkable pages for tracking your ideas, information, todo lists, tasks, bookmarks, projects, notes, brainstorms - in short, your life - in the most flexible way.
The wiki uses Markdown syntax for editing the pages.
There is also a Windows version.
Synchronization is done using Dropbox.
The sourcecode can be found on github, see the link on the Ema Personal Wiki homepage.
Fixed special characters bug in text of pages (hopefully), and pulled changeset from NikolausL which fixes special characters in the title.