Dual-monitor/multi-monitor taskbar recommendations

For the past month or so since I got my new laptop at work I have been merrily working away using Ultramon to extend my taskbar across both my monitors. This week, however, it has come to my attention that they actually want some money for me to keep using the software.

While the software is good and it does what I need, this is my work PC and I am not going to be approved to spend $40 on software to help me manage my desktop and wall paper, etc.

Are there any cheaper or free alternatives out there which would suffice?

Here’s what I use.