Very handy page that contains a list of all the url parameters for Google Maps allowing the easy creation of custom maps without a google account. :-)
An AWESOME piece of code that creates a python based gui google maps browser and auto-downloader for offline user. Really, really, really useful. :-)
Weather route planning, pretty awesome stuff... :-)
OpenStreetMap is a free editable map of the whole world. It's a wiki-like map which users can edit. You can upload GPS traces of areas and add street names, etc. Eat your heart out Google Maps.
A PHP class that allows for the easy (and relatively painless) insertion of Google maps into web pages. Instantiate the class, call a few methods, bingo.
Google Maps API Class. Insert Google maps with simple PHP class method (function) calls.