Gridcoin Research - Mining Release for Production Validation:
MSI v.5.7/Client 3.1.5.9:
 
- Added Checkpoints
- Checked in to Github - 100% open source!
- Scrypt Mining from Block 1-2050
- Incremented Protocol
- Download Link:  
  http://download.gridcoin.us/download/downloadstake/GridcoinResearch.msi
- Current block #52