GmapGIS is a free web based gis application. You can readily import multi column xy data file for spatial analysis on Google maps.
You can draw colourful lines, polygons, markers and text labels on Google maps. Measue area, distance on Google maps.
The drawings on the Google maps can be saved in downloadable file or you can send the drawing as link.
You can also upload a text data for display and analysis
GmapGIS web application uses Google's Gmap API to create web GIS for everyone to use