Simple Plugin Installer by ThomThom

Sketchup plugin creator ThomThom has created a great plugin that allows easy installation of RBZ, ZIP, and RB files. After the introduction of Sketchup 2014, it became somewhat of a hassle to install RB files so this nifty plugin is greatly welcomed.

Simple Plugin Installer by ThomThom

Viewport Resizer by Eneroth3

Viewport resizer by Eneroth3 is a great plugin that gives you the ability to export an image from Sketchup at any image aspect ratio you want.

Sketchup Extension Warehouse

How to Install Tools, Plugins, and Extensions in Sketchup via Designer Hacks

Designer Hacks has created a great tutorial video explaining how to install Tools, Plugins, and Extensions in Sketchup.

via Designer Hacks

Plugins by sdmitch

Plugins by sdmitch is a great list of useful SketchUp plugins accompanied with video tutorials.

Artisan Plugin: Organic Toolset

If you're looking for new ways to sculpt 3D models beyond the standard push/pull commands, check out the Artisan Organic Toolset plugin.

SketchUcation Plugin Manager and Store

SketchUcation has released an amazing Sketchup plugin manager that allows you to browse, manage, and install plugins and tools on the fly directly from Sketchup!

SketchUcation Plugin Manager