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Angle Tool is a modeling add-on for Blender that creates corner geometry from a cross-section selection in Edit Mode. Select part of your mesh, specify an Active Edge, then turn and extend the geometry around it.

Node Bar is a Blender addon for adding shader nodes through recognizable icons rather than the Search field or drop-down menus. Each icon carries a tooltip, and you configure the bar from the Shader Editor N-Panel.

Surveillance is a Blender add-on that shows clickable camera preview thumbnails in the 3D viewport, letting you switch between scene cameras. It offers Filmstrip and Tiled display modes accessible from the View > Cameras menu.