does anyone know a more free alternative to Doodle?
https://dudle.inf.tu-dresden.de/ (ajaxy, AGPL)
http://du7f.koalatux.ch/ (simple, AGPL)
http://totaler.chabis.ch/ (YATPAPPL, has its own license, sounds similar to the WTFPL)
Generic list at http://alternativeto.net/software/doodle/
More specific (to finding the right restaurant for the next LUG meeting implementations written by members of the LUG Switzerland (du7f, dauerpudel and YATPAPPL actually are also from members of the LUGS), but for the some either license or source code or both is unknown:
http://www.rolfp.ch/beizdudler/ (source code available, no license given)
http://www.buergi.lugs.ch/wte/ (likely some BSD license, no code published yet)