I am using this one, its a Margin lending bot for BitFinex

MarginBot - A Bitfinex Margin Lending Management Bot - https://bitcointalk.org/index.php?topic=865250.200

To do list:

https://github.com/ccxt-dev/ccxt


https://github.com/butor/blackbird

blackbird thread - https://bitcointalk.org/index.php?topic=985660.0