LTC is one... but there are others cheaper than LTC (in alphabetical order
):
----- DGB (Bittrex fee = 0.2 DGB),
----- ETC (Bittrex fee = 0.1 ETC),
----- KMD (Bittrex fee = 0.002 KMD),
----- NEO (Bittrex fee = 0.025 NEO),
----- QTUM (Bittrex fee = 0.01 QTUM),
----- STRAT (Bittrex fee = 0.2 STRAT),
----- XLM (Bittrex fee = 0.01 XLM),
----- XRP (Bittrex fee = 1 XRP)
----- XVG (Bittrex fee = 0.2 XVG),
...depending on what is desired, of course!