Lantern-web-app is a project mainly written in JavaScript, it's free.
Web app to control the Peel Street Lantern by Hackerspace Adelaide
http://hackerspace-adelaide.org.au/blog/tag/lantern/
By sighmon & Pix.
This software is made available under the terms of the simplified GPL license.
This web app is for webkit based mobile devices to control the Peel Street Lantern, which is a 32 x 32 pixel LED matrix built by Hackerspace Adelaide for the 2011 Format Festival.
http://hackadl.org
http://format.net.au/festival