Airtable - Airtable works like a spreadsheet but gives you the power of a database to organize anything. Sign up for free.
docassemble - docassemble is a free, open-source expert system for guided interviews and document assembly.
FriendlyData - Communicate with databases like a human
HotDocs - Template-driven, automated document & form assembly software
SpreadsheetDB - A database that you can query with spreadsheets
XpressDox - XpressDox Desktop for Microsoft® Office Word is an affordable document assembly system.