ShareMap is a online map creation GIS tool to create maps that can be later presented in various formats – as SVG vector graphic, bitmap raster or as interactive web map. The maps are free and licensed with Creative Commons license – it can be used on commercial and non commercial sites. You can use Sharemap to create map for Wikipedia or Wikipedia Commons. It is still in beta phase.
Here are some tutorials by ShareMap.Org:
Creating trail map with ShareMap
In this video you will learn how to create trail map using ShareMap – after creation trail map will be available as both interactive map and static map that can be used in printed leaflets.
The resulting map is available at http://sharemap.org/public/Tanbark%20Trail and the source map is located at http://www.hikinginbigsur.com/tanbarkmap.html .