In Leipzig there are actually more (and the quality is in average better than in Goslar).
The most famous are those:
Original Ritterguts Gose
Ritterguts Bärentöter - German Sour Gose Bock
Bayerischer Bahnhof Original Leipziger Gose
Ritterguts and BB brew also some special/seasonal/one-off
The latest addition in town is this one: Lotteraner Gose
