Certexams.com updated Juniper JNCIA NetSim recently. The main change is in the designer module which is now more user friendly. The labels at the device interfaces were not properly being placed in the older design. The same has been updated.
Check it out:
http://routersimulator.certexams.com/juniper-sim/index.html
Check it out:
http://routersimulator.certexams.com/juniper-sim/index.html