I sadly couldn't make it to the Blackboard usergroup meeting on the Building Blocks in use in The Netherlands. So in case others are interested, these are the Building Blocks we have in use at present at Utrecht University. (We are running Bb 6.3.1 and have no homegrown Building Blocks.)

• ABGM Group manager (a tool to read in Groups)
  
• Add users by role
  
• Advanced Group Manager (a definite improvement on the possibilities Blackboard has to offer)
  
• Discussion Grader
  
• Ephorus Dropbox (tool to check on plaguerism)
  
• Google Search tool
  
• Safe Assignment (tool to check on plaguerism)
  
• Seneca Who's Online