Can someone make a mod to show COM, COT, COA, during flight?

[CjStaal]

Or just add it on to one of the informational plugins?

[qzgy]

I believe the mod Collide-o-scope does this. It has an option where you can show flight markers.

[TheRagingIrishman]

Ya collide-o-scope will do that.

[artwhaley]

Also, Mechjeb has an option to display these bits of data... and a lot more.  I can't remember in which window you turn it on, but it's got a LOT of in flight markers if you want to also show thrust vector, angle of attack, error from commanded heading, etc!