SpaceDock: http://spacedock.info/mod/288/BackgroundProcessing
Source: https://bitbucket.org/j_picone/background-processing
BackgroundProcessing is a small and simple mod that performs some processing for vessels 'in the background' - probes or manned craft that have been left orbiting while the player is in the Kerbal Space Center or piloting another vessel.
Installation
* Download the BackgroundProcessing.zip file from KerbalStuff
* Extract it to your GameData folder