I'm going to divide the list by different versions of the game. Right now my SW RPG stuff is all in boxes, since I'm preparing for a move, so I can't check as thoroughly as I'd like, but here goes.
Edge of the Empire
The Jewel of Yavin
Beyond the Rim
Four (?) of the sourcebooks had scenarios is them.
The Dawn of Defiance campaign (ten scenarios) was published in PDF.
The Tempest Feud
The Living Force Campaign--more than sixty published in PDF and hard to find now
There were a lot of modules for this game. Here's a site with a good list.
Also, the fourteen (fifteen?) issues of the Star Wars Adventure Journal all had scenarios in them.