Pulse is a tool for managing installations of the popular Eclipse IDE.
To be up-front, while the tool is free, it is developed and supported by Genuitec, who also make the MyEclipse IDE. While they both come from the same company, MyEclipse is not forced on you or heavily advertised in Pulse. "Use MyEclipse or not, we're happy" appears to be the thoughts at Genuitec.
Being even more up-front, I am one of the people that choose to hand over their own money to use the MyEclipse IDE.
Having said that, Pulse supports both Eclipse and MyEclipse installations, plugin management and upgrades equally well (in my experience). Before using Pulse I had tried managing my Eclipse upgrades and abandoned it each and every time. There were a few issues with the previous version of Pulse, but since then I have not had a single issue and love having the ability to easily stay up to date with Eclipse (and of course MyEclipse) without resorting to complete reinstallations each time I wanted a new feature. These observations are all based on my experience, I have spoken to others that have not had the same ease of use, possibly due to proxy issues, but I have certainly never considered removing Pulse.

