I already checked with them - Crossland run TT software on their own servers.Quote from comintel:
Deep Discount Trading has Ninja with TT
http://www.deepdiscounttrading.com/TradingPlatforms.html
Commissions for FIX 50c+15c per side. 15c is FIX part, which drops to 10c after 2000 RTs a month. I guess 50c can also be negotiated for high volumes.