MyUnity is a simple graphical tool to customize Ubuntu Unity’s launcher, dash, panel, desktop, and font. The 2.0 version has released with adjusting Dash size, precisely changing Launcher size, Panel & Launcher transparency with scroll-bar of percentage.
MyUnity 2.0 now is available in Ubuntu 12.04 Precise’s universe repository.

Screenshots of MyUnity 2.0 in Ubuntu Precise:

Install MyUnity:

Ubuntu 12.04 Precise, just search and install MyUnity in Ubuntu Software Center.
Ubuntu 11.10 Oneiric and 11.04 Natty install MyUnity via PPA:

sudo add-apt-repository ppa:myunity/ppa
sudo apt-get update
sudo apt-get install myunity

Others can download the sourcecode from MyUnity in Launchpad