Tools and Toys
diablo2oo2's Universal Patcher -> patch generator with many features.
pediff -> compare tool for x86 PE files.
Advanced Scan -> PEiD plugin which uses the userdb.txt
Textscroller -> Textscroll Engine [with sourcecode and example]
Search & Replace Engine [masm sourcecode] -> used s&r engine in dUP.
ida_sigs -> Plugin for Ollydbg 1.x for applying IDA signatures