The FREE Cores. Ten of VisuStella MZ's plugins are free to use. These ten consist of the cores for everything else in the library. VisuStella MZ - Yanfly.moe Wiki
Here are some standout plugins you can grab at no cost: visustella mz plugins free exclusive
The absolute foundation. This plugin rewrites the engine's internal logic. It adds FPS optimization, touch UI improvements, and allows you to change the screen resolution beyond the default limits. It also includes a "Quick Event Cache" that makes loading massive maps instantaneous. The FREE Cores