The project pages:

• http://code.google.com/p/urd/
  
• http://sourceforge.net/projects/urd

• http://freshmeat.net/releases/280587/

 Free Software Foundation:

• http://directory.fsf.org/project/urd/

 Usenetpage:

• http://www.usenetpage.com/

 Usenetwatch:

• http://www.usenetwatch.com/

Snelrennen:

• http://www.snelrennen.nl (tutorial in Dutch)