Logitech is currently working on bringing back its trackball mouse with their new “MX Ergo”. The trackball is an alternative to the conventional mouse with the ball at the thumbs.
The Trackball mouse is an alien looking mouse which is pretty comfortable once you get used to it and it helps you to avoid inflaming like carpal tunnel or wrist pain. The mouse design takes you back to the nineties when it was used as an alternative to the conventional mouse.
The MX Ergo will be sold at $99.99 and users would be  happy to use the mouse in the peripheral market which has been dominated mostly by the conventional mouse. The MX Ergo can be brought from the Store by clicking this link.