TrueTone's CBAT Battery Clip Converter clicks into the battery compartment of any effects pedal that runs on 9V batteries and allows you to power it via any 9V power adapter with a 2.1mm barrel connector.
The Visual Sound Multi-Plug 5 Cable (MC5) is an excellent daisy-chain cable for 1 to 5 pedals with a roomy 30cm between every right-angled plug.
The Truetone MC-8 (previously known as the Visual Sound MC-8) is a dependable daisy-chaining multi-plug cable with 8 standard right-angled 2.1mm barrel plugs to feed power to up to 8 effects pedals.
The Truetone CL6 (previously known as the Visual Sound CL6) L6 Converter makes it possible to connect Line 6 modelling pedals and the Digitech RP100 with a normal DC power supply unit with 2.1mm plugs.
The Truetone CYR (formerly Visual Sound CYR) reverses a power supply's polarity, allowing you to use a centre-negative power supply on Yamaha keyboards/drum machines or centre-positive effects pedals.
If you have a power adapter with standard 2.1mm barrel plugs, then you can use the Visual Sound 3.5mm Converter (C35) for powering EHX pedals, old DOD effects and other stompboxes with a 3.5mm power input.