Comment by stuffaandthings

I use Albert on my Arch Linux installation as an alternative to Alfred. Not quite as good, but it works and is familiar (also extensible).

If you're looking for clipboard management, there are tons of linux solutions for that, see: https://wiki.archlinux.org/index.php/list_of_applications#Cl...

As for an alternative to Karabiner, I use Xmonad and manage my keymapping through the use of Xmodmap (https://wiki.archlinux.org/index.php/xmodmap)