byCycle.org is an open source (GPLv3), bicycle trip planner. It was actively developed from November of 2004 to May of 2007. Some experimental development was done after that but was never put online.
As of December of 2012, byCycle is back online, mainly as a hobby project.
Support was graciously provided by Mark Bosworth and John Miller at Metro.
 Other modes are possible but have not been implemented.