Elsamuko's GIMP Scripts - sites.google.com/site/elsamuko…
These scripts are a great place to start if you're looking for a way to make old fashioned & lomo looking images. These scripts require the GIMP which is free software available from - www.gimp.org/
How To Make Digital Photos Look Like Lomo Photography -
A detailed tutorial for faux-lomo using Photoshop. Although the directions are made for photoshop, the concepts translate nicely to other software.
Diana-Holga2 - registry.gimp.org/node/252
This script-fu for The Gimp is an attempt to simulate the Diana/Holga Toys Cameras effect.
If you have advice, tutorial links, or links to resources related to making faux lomo images respond to this post and I'll add your contribution to this post.