This Toad 11 beta new feature made me so happy !
Not only you can specify a color for your connection (ex: red=prod, green=devl), and this color is much more visible than it was in previous version of TOAD, but now you can set your connection to be read-only.
For any reason, bored, ill, under pressure, tired, you may screw up your database one of those days.
I feel so good that I can now setup my prod connection to be read-only. It is REALLY cool.
Setting the connection read-only is a TOAD feature. As it is in beta it may not be 100% bullet-proof. Mostly it allows you to do only SELECT in the editor, even if you are logged in as SYSTEM or SYS.
Anything comparable in SQL Developer?