After trying other products for some months, I'm back to Toad.
And I have to admit that (IMHO, and for the type of use that I'm doing of it): I've found no alternative to Toad.
The indispensable features that are missing in other products are:
Speed. Toad is blazingly fast; SQL Developer starts to crawl if you open more than 2 or 3 connections. When you have to operate with time constraints, you really can't wait SQL Developer to open.
The "open a new window until commit" functionality (a new window is opened after an insert or update statement, and you are forced to commit or rollback). Really handy to avoid pending commits.
The "execute current statement" functionality (shift-F9). SQL Developer doesn't have it, or you are forced to select the query you want to execute.