Open research-level problems in Geometry. Recreational problems and puzzles have their own categories.
Collected by Jeff Erickson. Mainly in geometry.
Open Problems from the Geometry Junkyard
Compiled by David Eppstein of the University of California at Irvine.
The Open Problems Project
A project to record open problems of interest to researchers in computational geometry and related fields.
Open Problems with Steiner Trees, maintained by Joe Ganley.
Last update:January 18, 2013 at 21:02:57 UTC