Home Page: http://portabase.sourceforge.net/
Portabase is a simple one table database - great for quick, err, simple record keeping. From the homepage ...
"PortaBase (portable database) is a program for conveniently managing one-table
database files. It can be used as a shopping list, password manager, media
inventory, financial tracker, TODO list, address book, photo album, and more."
Yes I appreciate it is a bit old however I have checked in the Solus Software Centre and haven't found anything similar. Suggestions welcomed.