Here are any authors notes on themes, screenshots and credits. Themes are also viewable on the demo page.
boldlight by @wavded
A light theme. Centered on page.
libnotify by @wavded
Inspired by libnotify on Ubuntu, similar to Growl on Mac as well. Smaller notifications in upper right hand corner of page.
bigbox by @wavded
A big box design I saw at a map presentation that I thought was neat.
jackedup by @jackmcdade
Just a simple, clean app-style theme. Notifications slide down from the top center with a bit of top margin.
flatty by @msurguy
Flat-looking theme. Notifications slide down from the top center.
original by @wavded
An attempt to match the original humanmsg theme.