ExecSQL
This is a simple app I wrote to keep track of all the various database servers I use, the databases on those servers, and the username/password combinations needed to access those databases.
You'll need a Common LISP environment to use this app, along with ASDF 3.x or better.
I did my development using SBCL and the included build script uses the buildapp utility from SBCL to generate an executable. (Although honestly, the generated executable is huge because it has to package up the LISP environment!)
You can also use the cl-launch application if you would rather not compile a native executable. The execSql.sh script is an example of how to do that.
To use this application for real work you will need to create a configuration file called ~/.execSql/config.lisp. There is an example provided that you can modify for your needs.