Grav - The modern open source flat-file CMS
Conga Contracts - Conga Contracts is management solution designed to accelerate and simplify contract negotiations in Salesforce.
WonderCMS - WonderCMS is the smallest flat file CMS. Completely free, open source, privacy oriented for over 12 years.
Concord - Contract Management Software and unlimited Electronic Signatures. Reduce costs, maximize compliance & mitigate risk. Enterprise solutions available.
HTMLy - HTMLy is an open source databaseless blogging platform. A Flat-File Blog and Flat-File CMS written in PHP prioritizes simplicity and speed.
CobbleStone Software - Managing contracts just got easier with CobbleStone!