[xet7]

WeKan https://wekan.github.io has IFTTT Rules like Trello Butler:

https://github.com/wekan/wekan/wiki/IFTTT

And webhooks:

https://news.ycombinator.com/item?id=44165008

WeKan has these, that Trello does not have: Swimlanes, all code Open Source, On-Premise hosting, etc