Help... How Did I Do This?

Okay... so my memory is getting really bad.... and I installed this a several years ago i think.... see screen shot... i did something that makes the bottom portion of the screen a darker color... and had some statistics (memory used, cpu usage, etc).
Aside from the fact that some of these stats no longer are working now that I just updated to Yosemite... I have wanted to remove these for a while now. Can anyone be so kind as to tell me how to undo these?

Edit: I found it. Geektool. Removed it from startup items and deleted the app.

At the time I set that up, it was handy to always see those stats on the bottom. I suppose now it will make more sense to just get a widget in Notification Center that shows that info. But at the moment I only see like 10-12 apps with widgets listed on app store. I'll check in a few weeks and it should start populating nicely.