Topographical transport viewer application - eg For the london underground.
GRAIL Real Time Location Service (RTLS)
Graphserver provides fast shortest-path computations on very large graphs, for use as a sub-component of a trip-planning service.
IVYGIS is a yet another take on getting PostGIS working with Ruby on Rails. It consists of building tools for building database-backed, web-based presentation of geographic data in form of maps, with mouse-sensitive polygons, line-strings, and the like.
ROUTE is a web app, initially implemented in Rails, that allows citizens to visualize possible transit options for their communities.
Extension library for Ruby to decode/encode WMO GRIB messages.
Simulates a vessel, including generation of NMEA 0183 sentences
This program is intended to be used for testing navigation software, in particular software using the NMEA 0183 standard sentences. The software simulates a vessel moving across the surface of the earth and has modules which generate NMEA GPS sentences as well as Compass Heading sentences. The program includes a TCP/IP NMEA server which takes the generated sentences and distributes sentences received from one peer to all other peers that have registered with the server (by connecting to port 2222) All modules can be used as a complete system for testing navigation applications which expect to consume NMEA 0183 sentences or individual modules can be used to integrate into your own application. The code is written in Ruby and requires Visual Ruby to be installed and working as well as the excellent Event Machine gem.
weatherdb makes weather data accessible from geographers: it maintains real-time MySQL databases of meteorological data retrieved from the Web and Unidata LDM, and provides CGI for catalog and OGC Web Map Service.