docassemble - docassemble is a free, open-source expert system for guided interviews and document assembly.
DocuGenerate - DocuGenerate helps you generate invoices, letters, contracts, agreements, certificates and more with our API and web app.
Knackly - Generate contracts, emails, or other documents of any complexity by automating your knack for doing...
EDocGen - DIY Document Generation Software for business users to create documents utilizing existing templates. Auto-generate business documents from your organization's databases, applications, or from simple fillable forms
HotDocs - Template-driven, automated document & form assembly software
Woodpecker - Legal document automation for solo & small firms. Simple to use, works in Word, connects to everything.