S# has a few licence types.
Free and for everyone. You do not need to generate and download license files! Just complete the registration! It's include S#.Designer, S#.Data, S#.API (OpenECry, Interactive Brokers, E*TRADE, LMAX, OANDA, Blackwood, IQFeed, Sterling, Rithmic, CQG, S#.MatLab, BTC-E, BitStamp, BarChart and RSS).
See also StockSharp installation.
Ready-to-use trading strategies (option hedging, market-making, quoting, trailing stop and take-profit, etc.).
S#.Shell source code.
40+ hours video training.
The license is paid and includes all the basic and extended licenses functionality, as well as:
ITCH - market data connector to LSE or NASDAQ.
HFT connectors has perpetual license with one year upgrade subscription option.
For more details please visit the StockSharp Pricing.