On my system, Query Tool for Postgres, and Create User both crash immediately. The other three tools (Create & Backup Database and Service Manager) seem to work ok.
Crash log follows...

11/7/07 3:25:53 PM com.apple.launchd[211] ([0x0-0x44044].com.druware.postgresql.CreateUser[2005]) Exited abnormally: Trace/BPT trap
11/7/07 3:29:10 PM [0x0-0x47047].com.druware.postgres.QueryTool[2019] dyld: Library not loaded: @executable_path/../Frameworks/pgCocoaDB.framework/Versions/A/pgCocoaDB
11/7/07 3:29:10 PM [0x0-0x47047].com.druware.postgres.QueryTool[2019] Referenced from: /Applications/PostgreSQL/Query Tool for Postgres.app/Contents/MacOS/Query Tool for Postgres
11/7/07 3:29:10 PM [0x0-0x47047].com.druware.postgres.QueryTool[2019] Reason: image not found
11/7/07 3:29:10 PM com.apple.launchd[211] ([0x0-0x47047].com.druware.postgres.QueryTool[2019]) Exited abnormally: Trace/BPT trap
11/7/07 3:29:29 PM [0x0-0x4a04a].com.druware.postgresql.CreateUser[2026] dyld: Library not loaded: @executable_path/../Frameworks/pgCocoaDB.framework/Versions/A/pgCocoaDB
11/7/07 3:29:29 PM [0x0-0x4a04a].com.druware.postgresql.CreateUser[2026] Referenced from: /Applications/PostgreSQL/Create User.app/Contents/MacOS/Create User
11/7/07 3:29:29 PM [0x0-0x4a04a].com.druware.postgresql.CreateUser[2026] Reason: image not found