A Tcl Package to read and write Shapefiles
GPS Trip computer, used to calculate distance (3 counters), quikly clear any of them, back counting
A loadable module for Tcl allowing access to the GDAL library's API
The VTK Geography library is an extension for the Visualization Toolkit that includes classes for spatial processing, coordinate system management, and reading/writing data in GIS formats (shapefile and DGN) and databases (PostGIS and ArcSDE).
Open Source Marine Chart Plotting Program
PC Marine Chart Navigation Software. Written in TCL/TK and C++ EMAIL: gdpound at msn dot com for more information