OpenDCC is an open project to implement DCC with standard electronic components, it is mostly based on the AVR microcontroller.

Currently a lot of the site is in German, I think you can help with the translation if you like.

A Professional FREE 3 monthly online Model Railroad magazine directed at hobbyists.

Magazines are designed for downloading and reading on your computer rather than being printed out.

A Model Railroad focused podcast/blog. For railroading beginners and seasoned line veterans.

An international, UK based group promoting interest in the application of electronics (including computers) to all aspects of railway modelling.

The JMRI project is building tools for model railroad computer control. We want it to be usable to as many people as possible, so we're building it in Java to run anywhere, and we're trying to make it independent of specific hardware systems.

JMRI is intended as a jumping-off point for hobbyists who want to control their layouts from a computer without having to create an entire system from scratch.

A group of home brew DCC projects mostly based on the PIC chip.