A while ago, I got the request to enhance cvechecker with support for providing a list of installed software (or software you want to watch over with cvechecker) even if cvechecker isn't able to detect that software on your system. I've implemented this and it is currently available in the SVN repository. The next release of cvechecker will support this, but I'm hoping to add support for other databases with it as well (currently, it uses a local sqlite database but I'm hoping to support at least MySQL and postgresql too).