New to ctan: the TeX Font Errors Cheatsheet, by Nico Schlömer. It’s for people trying to install fonts for vanilla (La)TeX (as I noted recently, there is an easier way), or for unfortunates whose already-installed fonts somehow break. It gives a chart showing what files TeX looks for when, cross-indexed to the errors that it gives when it doesn’t find things. Handy, if things are going wrong.