And yes, they are shareware. One is a firefox extension and the other is best described by experiencing.
The first is a gmail it extension. I do this a gazillion times a day – things to remember, things to blog, important phone numbers etc – I just email myself. Using this extension, just select what you want to email, right click and say gmail it. How is that for ease-of-use.
The second is goosh. For CLI (command line interface) or shell lovers, this is sure to tingle your spine. This is a shell version of the great Google itself. It is not a supported google product. It runs on the browser. And see below for a screen shot. (or) just go to goosh.org to see for yourself. Wow.
I have circled the commands that I passed. To search the web, just type web <keywords> ; to search images just type images <keywords>; for help type help. Amazing and it is blazing fast – like a good shell should be. And yes, clear, ls, and command history using up-arrow is supported. Yaay for that.
It also supports extensions – try typing “help load” without quotes. The problem is its difficult to figure out how to find extensions.
if you’re using firefox or opera with greasemonkey, there’s even a userscript to automatically load multiple extensions.
http://userscripts.org/scripts/show/28061
if you’re not familiar with greasemonkey google it.