What Video Capture software do you use?

[Mr. RetroLust]

I've seen quite a few video screen captures here and I'd like to make some as well for future projects, I see a whole lot of options on the internet, a bit too many to be fair so I'm curious in your experiences as i'm not to keen on trying out a lot of different software to keep the system as clean as possible. What I'm looking for is 100% freeware that can record in 60fps in at least 1080p but 2160p would be sweet. Several export formats and options would be nice as well. Thanks for any help/tips