MicroSpec VIC Data Manager (MicroSpec LTD, 1982) - It's hard to believe I've come across another (quite capable) database program for the Commodore VIC20 in the last couple days.  This one isn't quite as fancy as Mini Jini Record Keeper, but it's still impressive considering the limited hardware of a VIC20, although it does require at least 8K RAM.  The manual is included inside the archive.

** There's a C64 version of this program, but I only have the manual, so if you have a copy, please consider getting in touch if you want to share.