The Fishbowl: Product Activation Sucks
http://fishbowl.pastiche.org/2007/04/15/product_activation_sucks
"Product activation sucks. It sucks because your continued use of the software you purchased is forever dependent on the continued availability of the licence server. And it sucks because your licence can be unilaterally revoked because someone, somewhere
AquaticPrime: Secure Your Shareware Applications
http://aquaticmac.com
"The AquaticPrime framework is a secure registration method for your shareware applications, released as free open-source software."
codepoetry - Notae
http://www.codepoetry.net/products/notae#download
"Notae is a note program. It's a little bit of Stickies, a little bit of TextEdit, and a little bit like Mac OS 9's NotePad."