GPU Instancer is an out of the box solution to display extreme numbers of objects with high performance. With a few mouse clicks, you can instance your prefabs, Unity Terrain details and trees.

Converts distant complex 3D objects into simple 2D quads which significantly reduces triangles and drawcalls count. That's all at runtime without any preprocessing!

Advanced Culling System - it’s a bundle of tools for optimizing Your games.The main idea is hiding objects that not visible by the camera. For example, these objects may be overlapped by one large object or by many small objects.In the description, you can find links on videos demonstrating how this tool works. For example, comparisons of Occlusion Culling and Advanced Culling System