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When I start Eclipse and add it to the Unity Launcher, I get a ? symbol as shown in the screen shot instead of the Eclipse icon. The same happens for some other applications also and I am not able to differentiate between applications in the Unity Launcher. Also, is there a UI for easily adding launchers and quicklists? Also, how do I change the order of the icons in the Launcher?

enter image description here

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About the icon: perhaps you'll find what you need somewhere in one of those questions:… or – Anto Jan 18 '12 at 11:14

Try to add StartupWMClass=Eclipse line to the eclipse.desktop file.

To detect application's _WM_CLASS_ use: xprop | grep CLASS

After the plass appears, just click on your application.

Read this for further information.

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