Tools & tutorials about ROM hacking, including some ideas that didn't work out:
Aridia
Eisfrei
Text from the English version of Ys II in Dragon Slayer: The Legend of Heroes II
Searching for English words in .bin files (or any language or file type really)
Working with .ips files in Java
The Complete Guide to Phantasy Star III: ROM Hacking
The Complete Guide to Phantasy Star III: Lost & Found