Web site Krunch is an online file compression tool that lets you compress/uncompress files over the internet.
With Krunch, you can upload and compress your files, upload and uncompress already compressed files, uncompress and view/download compressed web files, and finally, grab files from the internet, compress them, and then download them. Krunch [...]

Greasemonkey script Gmail Encrypt adds encryption to the emails you write in Gmail.
Not all people uses encryption. But when your e-mail does all the Business stuff you should encrypt your conversations. This script can only be used from FireFox and you will need the Greasemonkey extention to make it work.
Greasemonkey script [...]

SteriPEN, a device for travellers that claims to use UV light to clean drinking water of "bacteria, viruses and protozoa,"
Ever find yourself in [undefined country] and run out of bottled water to drink? Use the SteriPEN Water Purifier to kill bacteria, viruses and protozoa without using chemicals or boiling. Simply stir for [...]