The Tools section of the L10NWorks website contains a wealth of free resources for translation and localization professionals.
The list is neatly divided into logical categories such as Encoding, QA Tools, etc. and is easy to navigate. Some of the tools do not need any download or install: You upload your data (the site promises not to retain or use it in any way) and let the programs process it. Once the procedure is complete, you can download the modified data for reuse in your projects. Tools that need a local PC for processing can be easily downloaded and installed with a simple click.
All in all a very useful, easy to navigate site which I hope will be kept up to date as new tools are created or improved.