Does anyone know of a window manager or some sort of "app tray" that allows me to press something like the super key plus a number to choose the app I want but press it again to start cycling through the apps in that "number column"? I'll try to clarify better if my description is a bit confusing. It doesn't necessarily have to have your typical looking app tray. Could even be those interesting circles too.

What kind of code microprofiling/benchmarking software do you guys use? I was wondering if anyone knew of any that can also be used as a separate tool (open source preferred but I dont mind proprietary) rather than already integrated into something like Visual Studio.

Edit: I would like it to support Windows and Linux. I mostly program in C right now, but expanding into other languages (e.g., Rust, Python)