Links to things I really should find time to check out :
MapSurfer.NET is a free, modern and advanced framework for producing a cartographic product of a high quality. This full featured framework offers a rich set of tools and techniques to automate various cartographic tasks. MapSurfer.NET is designed to be fast and flexible for being used both in desktop and web applications.
Open least cost paths (car, public transport, walking etc)
(Flight data, and airport details)