Geographic Information Systems: Tools, Scripts & Utilities
United Nations Food and Agriculture Organization (FAO), WinDisp is a public domain, easy to use software package for the display and analysis of satellite images, maps and associated databases, with an emphasis on early warning for food security. WinDisp was originally developed for the FAO Global Information and Early Warning System.
VisiBone Webmaster's Color Laboratory Color library
ArcMap2GMap converts shapefiles to Google Map overlays
Department of Agriculture, Rocky Mountain Research Station, Wildlife Project ArcView 3.x Tools
Oregon Department of Forestry GIS Tools, includes Xtools