Tom's Peripherals
A small CC: Tweaked addon, with a few useful features, such as:
Bitmap Monitors and GPU
Draw any high resolution grahics using Lua, even 3D.
The GPU supports loading and saving PNG files.
See the example code repo.
Up to 64x64 resolution per monitor block. See the wiki for all available functions.
Redstone Port
More redstone sides for your computer
Watch Dog timer
Restarts the computer if its internal timer reaches the end.