In web interface of salesforce, while viewing either an apex class / apex trigger / visual force page / visual force component / debug log, this extension replaces apex classes keywords with link to them. The tooltip of the link shows the api version the apex class is on.
This is must have chrome extension to core developers. It becomes handy to navigate to other classes without leaving current page. Good job
This is a must have for all novice or expert developers! once you get it you will wonder how you managed without it!
nice