This is a little C program that is supposed to detect grid type patterns within jpg images. It's pretty experimental and unpolished. I never used it for anything of note.

This is a small java library that performs language translations by scraping the Google translate web page. The interface is very simple. I currently use this as the core for a SOAP webservice published here and eventually a REST service as well (in progress). I hope that eventually Google will provide their own web API. This is a maven 2 distribution. API Documentation can be found here.

This is a small perl library with a single method that will tell you if a jpeg image is corrupt or not. It uses libjpeg to parse the image data and will simply return true or false. If you have a gazillion images and you need a perl script to detect all the ones with errors, then this lib is exactly what you need.