Brainsplat: A PHP/MySQL journal program:
BrainSplat was originally conceived to scratch my itch for a journal program that I could use to replace LiveJournal.
It is a simple blogging program that has support for comments. The recent additions is a client interface and a forum like code for formatting BSPHPCode. The reason I made my own was simply because all the scripts I found were generally made for multiple users. And thus, I made my own. I started originally in Perl, but I found that PHP makes a much better interface for these type of programs.