We've been using EMS PostgreSQL admin.
Pros:
It has great visual tools for building views. Like in Enterprise manager or MS Access. pgAdmin don't have that.
Great import/export abilities. PGAdmin don't have much flexibility.
Cons:
Too bad it don't support UNICODE and not known if it will.
Problems with dollar-quoted procedures. But that's PostresSQL long-standing problem. I mean if you have procedures you may create then only in command-line psql or pgAdmin. Other tools that are not developed by Postgres team will choke and report something about unterminated constant.