Hi all,
I developed a simple plugin for ST3 which allows to search for translations on LEO (dict.leo.org).
It is available here: https://github.com/tcpluess/sublime_leo
Just place the cursor on a word and go to the command palette; either select DE -> EN or vice versa. This launches the web browser and searches for the word in LEO.
I first wrote the plugin just for me, so I decided not to try to add it to packagecontrol, but now I found it may be handy for some other people so I share it here with you.