I'd also recommend checking out https://github.com/houmain/keymapper if you're interested in context aware remaps (based on OS, application, device). It's cross-platform as well.
Keymapper was posted here ~10 days ago https://news.ycombinator.com/item?id=42871040, but the link received relatively little attention, so I assume it might have been missed by many.
Disclaimer: I'm active on the issue threads and a big fan. :)