How to install Eclipse Marketplace if it is missing

Eclipse 3.6 (Helios) introduced the Eclipse Marketplace that allows easy installation of Eclipse plugins. It still is slow as shit but it's much easier than having to handle all those update sites manually.

For some reason the Marketplace is not bundled in the Eclipse Classic distribution. However it is easy to install. I'm showing this for Eclipse 3.7 (Indigo).

1. Open Help - Install new Software…
2. Select the update site for the current Eclipse version (usually it's simply named after the version and has the URL http://download.eclipse.org/releases/indigo
3. Search for marketplace
4. The entry Marketplace Client should appear
5. Install as usual