There’s Avid Media Composer, which is editing software. Then there are several hardware devices that the software can work with as I/O and acceleration devices.
– Mojo SDI (SD only, no HD I/O)
– Mojo DX (SD and HD, limited amount of physical I/O)
– Nitris DX (SD and HD, more physical I/O and hardware codec acceleration)
There used to be Adrenaline, also a hardware box, a predecessor of the Nitris DX. No longer a current product.