Item configurator. It doesn’t attach to the contraption but can be used to modify attached devices, like the maker pen from Rec Room.
Repeater. Repeats an action performed by a triggerable item.
Timer. Causes a system to wait or experience delay.
Motion detector. Detects a player or play-built item moving.
Item detector. Detects an item in bags or in the area.
Detacher. On button press the selected item will separate from the contraption.
Rotator. Rotates things (wow!) at a variable speed depending on a setting.
Computer Chip: Can be linked to a configurator allowing simple block-based coding, again similar to Circuits from Rec Room.
USB/Wire: This allows you to physically connect the logic devices, and multiple USBs can be gooped together to create a longer cable which can reach further.
When these are used in conjunction with simple mechanical components like the lever, gear, shaft, hinge, rack/pinion, cam, etc, you can make some really intricate contraptions!
Feedback is appreciated!