Skill Trees. Like This . Maybe a website, or application, that starts with just the bare-bones code for creating skill trees, and you can create an account and add a skill tree to your account from a list of existing searchable skill trees, or you can create your own skill tree if you can't find one that's appropriate for you and that will allow other people with similar goals to add your skill tree system to their account, etc.

That definitely looks interesting, and I've been thinking about pretty similar things. I hadn't found Dungeons and Developers, and it is pretty neat (though it's just a proof-of-concept / a fancy way of displaying a list of web development skills).