Simple, but useful

Handy little application - basically seems to just use the mobile version of GMail in a miniature web-browser with some added shortcuts. Apparently there are new touch getsures supported in this version, but as theres no help, Im not sure how to use them.
Very handy, not too CPU or memory heavy - Im not sure what the Plus (paid) version adds, mind you.

MattCLane about MailTab for Gmail - Email Client, v2.0