https://blendermarket.com/products/simplebake---simple-pbr-and-other-baking-in-blender-2

SimpleBake is the definitive baking solution for Blender. In short, it allows you to simply bake PBR and other textures.Blender provides a very powerful way to create complex PBR materials by using nodes. However, what should be a simple process of baking and exporting these materials for use with other software or systems (Substance Painter, Second Life, Sketchfab, Unity etc.) is surprisingly difficult.SimpleBake aims to address this problem. SimpleBake is an addon / tool that provides a one-click solution for simply baking PBR maps from materials created in Blender.

Low Poly Environment Builder Blender Addon v1.4

Advanced Fog is the perfect addition to the latest volumetric fog enhancement introduced in Unreal Engine 5.3 and 5.4.

https://www.fab.com/listings/39fe9362-4fd8-4033-87c3-0ea5bf0334c3

Advanced Fog is a fantastic solution that has been designed to bring realism and atmosphere to any environment created in Unreal Engine. It offers an effortless way to add fog, clouds, and ambiance, taking the visuals of your project to the next level.Advanced Fog comes with an extensive collection of over 25 textures and 9 materials that cover all aspects of fog creation. In addition to its vast collection of textures and materials, Advanced Fog boasts a wide range of customizable parameters, allowing users to achieve their desired atmospheric effects with ease. Whether you're aiming for a thick and mysterious mist, a gentle haze, or a dramatic stormy ambiance, Advanced Fog provides the tools to bring your vision to life.

https://blendermarket.com/products/qol-tools-spec-lighting-ops

Software Version     4.2, 4.1

Now available as a Blender 4.2 EXTENSION format addon!   Spec Lighting Ops is a tool and small suite of utilities to aid with specular lighting in Cycles.