As I'm in my 'introducing' projects period, I figure I'll announce this one as well. A small project I created a few months ago, which helped me in trying to bypass some IDS/IPS systems by encoding and decoding certain strings to new formats, that would not be detected.
I give you: the decoder, encoder and obfuscator. I'm still looking for a fancy name. :)
While it's probably rubbish for most, it's an easy tool for me (that I can upgrade when I want, instead of the widely available tools out there) to encode or decode content I choose. It's particularly been useful for quickly playing with base64, URL encode and one-way hashing algoritmes like md4/md5, sha* and the more exotic tiger* and ripe* stuff.
I've also listed this in my "projects page" on the blog.