Kelada (AJ#2 p.229): Major producer of walker parts and repulsor components. Lorana's Labyrinth, an oddly designed bar is here, too.
Arcan IV (#79) Industrial, overpopulated, and crime ridden. Just like new york 20 years from now. Very fun.
Obra Skai (HTTESB p.89-90): A massive libary, the sum of most knowledge in the universe can probably be found here.
Krake's Planet (#63): One of the major Imperial data vaults is located here, deep in a valley, protected by an energy field. hard to get into, and harder to get out.
Terrijo (DFR): Located between New Cov and Pantolomin, Terrijo is where Han Solo removed a homing beacon planted on the Lady Luck by starship thief Niles Ferrier.