I released a new version of dbtool. This is a small tool I wrote over 15 years ago! I reworked the configure script and a couple of bits here and there. However, the most fascinating thing is, that I didn't have to alter the source at all. I still compiles out of the box, with berkeley db or gdbm; and pcre. Now this is really great, that the APIs of those libraries are still supporting 15 years old clients, I'm amazed.
Besides, I moved the source to github.
Just in case: with dbtool you can manage key/value data storage in the shell (on the command line or in shell scripts). It's fast and simple to use, doesn't have much dependencies and even supports encryption (using AES block cipher).