comp.mail.eudora.mac FAQ
Scripting
Scripting Information:
Eudora and AppleScript Handbook
by Scott Gruby.
Eudora example scripts
Eudora Pro 3.x Resources (link down temporarily!) from Dave Del Torto lists the resource and preference numbers you need to make plugins or scripts.
ScriptWeb
has links to Mac scripting resources.
Other:
OSA menu
gives you a pulldown menu next to balloon help menu that makes it easy to run scripts for whichever application is currently the frontmost application.
Jon's Commands
gives your Mac the ability to use extra commands in AppleScripts.
Frontier
FaceSpan
OneClick
HyperArchive's Scripting section