How to free mouse (multi monitor)

I have a triple monitor setup and I like having multiple things open while gaming. one screen has all my temps, workload, ect.
the other usually has teamspeak, chrome, ect. while gaming I was wondering if there is a way to free your mouse from the game window without having to press ALT+TAB minimizing the game and causing the screens to blackout for a second.. I play all games at my monitors native 1080P (all 3 monitors are 1080P).

If my specs are important for help here.
core i7 3770k - 8GB RAM - GTX 770 4GB 
I also have a logitech G510s with macro keys so if i have to assign some kind of command to a key its no issues.

Thanks in advance guys! 

One way would be( if possible ) set in game into Fullscreen Borderless that why you can go out of game without minimizing game. 

 

 

Ya playing windowed border-less is what I use for many games and it works great as all you have to do is hit escape and you can click on things on your other screens.

thanks guys! i find that some of my games have that option but not all of them. sucks... would you guys happen to know any other options for games that dont support borderless ?