News ticker - "Enemy aircraft spotted" this way you don't even have to look, if enemy has gunships or airplanes yourself.
Nuke button - Self-explaining.
Advanced player list - Good to know elo of your team mates, so you might want to spawn near newbies @ front (if they even go front) and help them (if you are nice enough).
Toggle LOS - This one I downloaded somewhere from, I prefer to play with "Fog of War" on.
Hmm.. there are 2-3 more widgets I use, but I will have to check in game next time which are they.