CPU frequency scaling for 12.04?

indicator-cpufreq can be found in the Software Center by searching "cpu frequency" and then clicking on the "show technical items" option:

And this is what it looks like, to compare what you were used to in 10.04:

• Note that you may need to put it in startup if you don't wish to start it manually every time -- usually it should go into Startup Applications automatically, like this:

I use indicator-cpufreq on Unity. It seems very parallel to what I use with 10.10. You can install it using

sudo apt-get install indicator-cpufreq

I did a little bit of research and found this thread on Ubuntu Forums that explains how to use cpulimit to set the maximum consumption for a particular process. It runs as a daemon that will monitor all processes.