source
Arcmenu

ArcMenu is an application menu for GNOME Shell, designed to provide a more traditional user experience and workflow. This extension has many features, including multiple menu layout styles, GNOME search, quick access to system shortcuts, and more! If you are a new user to GNOME and are looking for a Windows style start menu, this extension will be perfect for you!

Dash-to-panel

Dash to Panel is an icon taskbar for Gnome Shell. This extension moves the dash into the gnome main panel so that the application launchers and system tray are combined into a single panel, similar to that found in KDE Plasma and Windows 7+. A separate dock is no longer needed for easy access to running and favorited applications.

dconf-editor

Graphical editor for gsettings and dconf.

Just Perfection

Disable and Customize GNOME shell UI Elements.

Screenshot Tool

Conveniently create, copy, store and upload screenshots.

Simple Net Speed

Simply showing network speed.

Sound I/O Device Chooser

Shows a list of sound output and input devices (similar to gnome sound settings) in the status menu below the volume slider.

Vitals

A glimpse into your computer's temperature, voltage, fan speed, memory usage and CPU load.