Perfect when preparing 3D-printouts

• Check and find errors

• Make Manifold (water tight) Quick repair

• Easy STL export

Great library with drag and drop inside Blender :)

Use Filter and Free first

• Materials

• Manikins

• Props

• Objects...

Smarter and quicker way of (F) fill!

Heres an example with Fill (F) and only a vertex selected

Mouse location dependent fill direction! 

• Use Loop Tools > Circle to shape verticies perfectly

• Use Bridge to connect this loop to another part of the mesh

• Smooth out unwanted wobbliness

Youtube: Blender - Loop tools Curve Tool : Panel Beating - #21 Subdivision Surface Modelling

Youtube: Loop Tools Addon | Important Mesh Editing Tool | Blender 2.8

• Make a "skirt" in any angle:
  Offset Edges > Extrude > Angle

Youtube: Make sure you enable edit mesh tools

• Set Flow:
  Aligns selected edges with the natural flow and curvature of adjacent geometry

• Set Curve & Set Linear:
  Additional operators that help shape edge loops into:

  1. 1. defined curves or 

     2. straighten them into a linear arrangement

• Adjustable Parameters:

  1. 1. adjusting tension, 

     2. iterations, or 

     3. min angle to achieve the desired result

Youtube: Edge Flow Tool - Blender

Shrink/stretch several objects or several faces

Youtube: Blender addon review: Simple Lattice

Simplifies Boolean operations - like:

• • 1. union

    2. difference, and 

    3. intersection

• A must-have for anyone working with shaders. It speeds up node editing dramatically and is included by default in Blender  

• Good when bezier/nurbs curve/surface modeling

Youtube: Curve Tools - Blender Add-ons Make a radius fillet