These screenshots are slightly outdated, but TibEd still looks the same. If you have some nice screenshots, you can send them.
Screenshots of TibEd v1.1 - Dune 2000
TibEd v1.1 - Tiberian Sun
Old screenshots of beta 2/3/4 - TibEd looks different slightly now
I am adding a new Mammoth Mark II...
Wow, this is a screenshot of what beta 4 will bring: RA-Edit in TibEd!
Another beta 4 preview: Multiple editors: Select your game and language!