Heaven's Ladder
Miracle Machine
Cosmic Armor
Hourman M*
Element X
5d/Monitor tech
Pretty much anything created by Metron (ie. the Mobius Chair, Boom Tubes, etc.)
*However, I'm not ready to give him credit for the Worlogog's creation. I am well aware that Metron once told the heroes he built it -Super Powers #5 (1984)- but during the JLA: Rock of Ages storyline (1998), Metron said that the Worlogog had previously been lost for 4,000 years (and said nothing about building it.) That statement essentially retconned the Worlogog's earlier appearances.
...Plus there's a HUGE difference in the Worlogog's depiction/portrayal from then to more current times.