There are a few workarounds in Windows, but not to the level of accuracy this program has. There is a ton of memory that Windows holds in standby that it won't use except in drastic times.
The idea behind this program is that once you hit a certain memory threshold in terms of free memory, then the game or program will take a drastic dip in performance. Once you boot it up, you'll notice an incredibly simple UI. Installing Intelligent standby list cleaner is as easy as simply running the executable and select the correct folder. One of them is to streamline memory usage as much as possible, which programs like Intelligent standby list cleaner helps you do. While the easiest way to increase it is to buy bigger RAM sticks and install them (unlike all those scam sites online), there are also other ways to optimize memory.
Your computer's performance hinges closely to the amount of memory you have installed.