Do-It-Yourself Mapping - GPS Visualizer

GPS Visualizer is a great online utility that can handle just about any mapping need you may have. It can create maps from GPS data, street addresses, or simple coordinates. It will take data from all kinds of digital sources as well as manually.

GPS Visualizer can read data files from many different sources: GPX, OziExplorer, Geocaching.com (.loc), IGC sailplane logs, Garmin Forerunner Logbook (.xml/.hst), Timex Trainer (v1.3+), Cetus GPS, PathAway, cotoGPS, TomTom (.pgl), IGN Rando (.rdn), Emtac Trine, Suunto (.sdf), NetStumbler/WiFiFoFum, and of course tab-delimited or comma-separated text.

GPS Visualizer can draw maps in SVG, JPEG/PNG, and Google Maps format, and can also create KML files for Google Earth.

GPS Visualizer has so many features and seems to be adding more. Check it out.