Tim Zoet

Particle Instantiator is a Blender add-on that converts particle systems into real objects, each following its particles' exact motion through keyframes while copying animations, constraints, modifiers, drivers and custom properties from their dupli objects.

Level Of Detail Manager brings level-of-detail support to Blender's Internal and Cycles renderers, swapping an object's mesh, modifiers, constraints and materials based on its distance to the camera to speed up the viewport and cut render times.

Cycles Object Color is a Blender add-on that lets you assign a mesh- and material-independent color to each object using its pass index. One material can then drive different colors across many objects.