[caption id="attachment_358" align="aligncenter" width="550"]
Catznip with OpenDyslexic in a notecard[/caption]
Catznip is an open source Second Life client for Windows and Linux with that in addition to a lot of usability enhancements, supports setting different fonts for parts of the UI. Open Dyslexic was the motivation to add this feature and has been very well received by our users.
Get it: http://www.catznip.com/