Highlight Plus adds outline, glow, overlay, see-through and other effects to any 3D object in your scene. See the integration repo on GitHub The Highlight
NeoFPS is designed to be extendable and adaptable, and to integrate with your code. This page details the assets that NeoFPS has already been integrated with. For more information on upcoming integrations you can check out the roadmap. You can also suggest assets that would work well with NeoFPS for integration via the NeoFPS Discord server, or via the contact page.
More integrations are planned and in development. For the very latest integration repositories, you can visit the Yondernauts Games GitHub page.
You can find the assets that NeoFPS has integrated with on the Unity Asset Store.