hey dude the top left is starscream from the original transformers along with the top ceter is optimus prime form the original transformers that was made in the 1970's and your "dragonfly" is from mobile suit gundam Zata and the bottom ones are both conseps from transformers war of cyberton
that is my version of Optimus and Starscream, but you are completely wrong about the others. The one looks like it is from War for Cybertron because I created some of the actual concept art for WfC and it is in the same digital painting style. You really need to learn more about Gundam because you are soooooo wrong about that one...it is actually an homage to Macross.
The upper thighs and forearm of that mech kind of remind me of swiss army knives