I am using OpenBox WM and I am looking for some simple dock application (that could be used along with OpenBox) that has this icon "pinning" feature. It can also be a panel. So far I have found this:
Docky - it's fine but it needs compositing manager
wbar - compiles but isn't working for me (does not appear), and I am not sure if it has the "pin" feature
Any other tools that can do this?