Mesecons by Jeija
Adds digital circuitry, including wires, buttons, lights, and even programmable controllers.
Buszmo's technology gallery
A collection by Buszmo
Packages
Techage Modpack by joe7575
Go through five tech ages in search of wealth and power
Storage Drawers by LNJ
Adding simple storages for items, showing the item's inventory image in the front.
Digtron by FaceDeer
Adds components for building modular tunnel boring machines
Pipeworks by mt-mods
Supplies a complete set of nice, round mesh-based water pipes, boxy item-transport tubes, and devices that work with them.