Small jumping bugs inside Swiss flat
I believe these are some sort of Psocoptera, "booklice", even though they don't really jump much. Could it be that they ran or flew a little bit instead? I won't try an identification of the species, but in general booklice like damp places and most of them aren't considered serous pests.

Example of a booklouse:

Slender legs and antennae, wings, and general appearence close to your specimens. 
(Image from Wikipedia)