SWeTE is an HTTP reverse proxy that provides website translation. You can set up proxies for any sites, then connect a translation memory to the site to have it translated into any language. It provides a web-based translation form, and an option to translate strings using Google's translation API.
TransHelp is designed to assist in checking the consistency of Chinese-English translations in a translation project. It is written in php and python. It is especially useful in collaborative translation projects.