Dunno really - all your stuff seems fairly specialised to particular niches. I'm not a PHP guy and don't understand that stuff too well. But maybe put up some sales pages for your products with "buy for $30, money back guarantee if not happy" or similar and an explanation of what the stuff does in a way that people who need to, for example, "develop on latest PHP and deploy on PHP 5.2" can find you with Google?

Plus blog the odd 'how to' article with links to your stuff again so people can find it?