Update: As of 28th
July 2012, Touch Mouse Mate's developer has announced that the
project will no longer be maintained. It will continue to work in
Windows 7 and 8, but won't get
any updates in the future.

The Microsoft Touch Mouse is crafted specially for Windows 7. It
is equipped with features that make navigation on Windows 7
super-fast, but it lacks the middle-click function - a feature
so basic that almost every mouse on the market has it. This can be
very annoying to those who use the middle-click button very often.
There are many applications which can be nearly unusable if your
mouse lacked the middle-click function.
Currently, there are many workarounds. Many applications and
AutoHotKey scripts claim to enable middle-click on the Touch Mouse,
but people may take time to get used to most of them. Out of these,
the one that works brilliantly and as advertised is Touch Mouse
Mate.
Touch Mouse Mate (TMM) is a project started by Lex
Li. It is based on a utility released by J5, an Italian
developer, and has many new features and improvements made by Lex
and other contributors.

TMM has three features:
- Middle-click: It triggers the middle-click function
when the left touch area and the right touch area are tapped at the
same time.
- Touch-over-click: This function translates your touch
gesture to physical clicks.
- Left hand: It has support for left-handed users.
At the time of writing this article, the latest version of TMM
was 1.5 beta and had no option to start TMM with Windows, but expect a lot of
improvements in the coming months.
Download TMM
from CodePlex.
Note: For Windows 8 users, Microsoft has released Device
Center, which gives you an option to enable middle-click, but you
have to sacrifice left- or right-click.
Update: We did
a detailed review of the Microsoft Touch Mouse. Read it
here.