Network Toolbar

I have an Acer 5560 Laptop that had a toolbar that showed the PC’s that were on the network I was connected to, be it wired or wireless. I closed it one day and cannot get it back. I don’t know where it came from and can find no references to it. I am running Vista Home Premium SP1. The toolbar would autohide just like the taskbar. Has anyone seen this thing or know which vendor supplied it?