Ball peen hammer or a 12- or 16-ounce clawhammer.
Rubber force cup (plunger or "plumber's friend").
Cold chisel and center punch.
Cleanout auger ("snake").
Friction tape.
Adjustable pliers.
Additional tools required for more extensive plumbing repairs include:
Pipe vise.
Set of pipe threading dies and stocks.
Hacksaw and blades (blades should have 32 teeth per inch).