Amazon.com: Tool Free RJ45 Connectors for UTP CAT6/CAT5e/CAT5, Punch Down Type Ethernet Cable Male Plugs, Easy DIY Network Termination, No Crimper Internet RJ 45 for 23awg-26awg, Toolless LAN Cord Ends [3Pack] :
RJ-45 Ethernet Female Socket to Terminal Spring Block Adapter : ID 4511 : $7.95 : Adafruit Industries, Unique & fun DIY electronics and kits
Unmanaged 1x 100M/1G/2.5G/5G/10GBase-T to 1x 10GBase-X SFP+ Slot 10Gigabit Ethernet Media Converter, European Plug standard - FS.com Europe