docassemble - docassemble is a free, open-source expert system for guided interviews and document assembly.
WiseStamp - WiseStamp allows you to easily create and implement slick and unique email signatures for your business.
HotDocs - Template-driven, automated document & form assembly software
MySignature - MySignature is FREE Email Signature Generator that helps to create Professional Signatures for major email clients such as Outlook, Gmail...
Woodpecker - Legal document automation for solo & small firms. Simple to use, works in Word, connects to everything.
Sigstr - Email signature marketing