The Zaubray system is host to Elaaden, home of New Tuchanka and a possible Initiative colony.
There's a particular asteroid in the asteroid belt you can scan (left and slightly up from the sun) for a graphite deposit
Elaaden: A major explorable world, host to many story missions, side missions, and a potential colony site.
H-315: Unexploitable world of cornflower blue
Grogorna: Molten world with a copper deposit.
Dubraaci: Hot world with a scannable Crevasse that yields XP.