turf - geospatial analysis engine written in node.js. The goal is to provide a high level gis scripting api similar to arcpy (but much faster and open source). Anyone interested in maps or stats might find it interesting.

https://github.com/morganherlocker/turf

If you do not have expertise in computational geometry or geospatial analysis:

1) I would be happy to share whatever knowledge I have and tee up a few easier issues to work on

2) Feature requests, testing, design (hoping to get a dedicated site up and running), and help with docs are also extremely valuable.