The Snap Action 1-to-1 Wiring Block Connector Clear PCT-2-1M (5pcs) is great for basic power or signal splicing. These individual blocks can be snapped together side-by-side, to make wider distribution blocks.
Each block connector has a metal block inside and levers that snap open and close to bind stranded/solid-core wire from 12 AWG down to 24 AWG. No screwdrivers or crimpers are required, making them super handy for free wiring.