Amazon.com: Apple Thunderbolt 3 (USB-C) to Thunderbolt 2 Adapter : Electronics
Amazon.com: Mini DisplayPort to DVI, Benfei Gold-Plated Mini DP to DVI ( Thunderbolt Compatible) Male to Female Adapter Compatible with MacBook Air/Pro, Microsoft Surface Pro/Dock, Monitor, Projector and More : Electronics
Amazon.com: elago FireWire 400 to 800 Adapter (White) for Mac Pro, MacBook Pro, Mac Mini, iMac and All Other Computers : Electronics
Kanex Thunderbolt to eSATA plus USB 3.0 Adapter
Amazon.com: StarTech.com Thunderbolt 3 to Firewire Adapter - 1394 FireWire - External PCIe Enclosure / Chassis plus Card - with DisplayPort Monitor Port (BNDTB1394B3) : Electronics
Amazon.com: Tripp Lite FireWire 800 IEEE 1394b Hi-speed Cable (9pin/4pin) 6-ft.(F019-006) black : Everything Else
Amazon.com: elago FireWire 400 to 800 Adapter (Black) : Electronics