This widget contains a lot of useful functions.
1) It shows ally's and enemies' AA cover. It helps to save your planes and build new turrets in the right places.
2) It shows decloak range for selected cloaked units, so it is easier to surprise enemies by your new skuttle.
Also, it shows range between enemies' units by red, orange or green line.
Red line between two enemies' units means that it is impossible to go betwen them. Orange line means that you should be careful and the green one shows that it is easy to pass.
3) It shows important information about enemies' commanders. You need to just cast your look on com's head and you know it's damage, dps and attack range.
4) Now you do not need to type "SHINY" every time you nuke someone. This widget automatically says it to chat.
And lots of other useful things!
http://pastebin.com/YXDJH4Jd