rocket-store
A simple, super fast and yet powerfull flat file database.
schluessel
Rails like credentials store for database passwords, API keys, etc. encrypted in your repository.
dirdb
DirDB key-value directory database
jstorage
jStorage is a cross-browser key-value store database to store data locally in the browser - jStorage supports all major browsers, both in desktop (yes - even Internet Explorer 6) and in mobile.