Plugins
How to install plugins:

Drop dll files to 'Plugin' page of Option window.
The file path must be persistent.

You can add plug-in buttons by drag & drop items from Command Button page of Option window to Command Bar.
　

　　　　　　
dll.png Window manager 1.3.0.0
2015-12-3

This can force folder windows to open at preferred size or position.
Also provides keyboard shortcuts to move or resize window.

1.3.0.0 : Support Per-monitor DPI.
dll.png FileTools plugin pack 1.3.0.1
2015-12-7

Pack of Command buttons.
(Cut, Copy, Paste, Delete, Copy To Folder, Move To Folder, Undo, Copy/Move To Parent, Properties.)

For ver 1024.
dll.png SelectionTools plugin pack 9.0.0.2
2014-12-24

Pack of plugins to handle selected files in view.

Select Empty
　　　Finds 0 byte files and empty folders in view.

Select by extension
　　　Provides a button and keyboard shortcut to select or filter files with the same extensions as selected files.

Selection Info To StatusBar
　　　Displays informations of selected folders and files in statusbar.
　　　You can choose size, date of creation, date of modification, attributes, drive info, and folder info.
　　 Windows 8 and later has no status bar!

Edit attributes
　　　You can edit file system attributes of selected objects.

For ver 1024.
dll.png File creation plugins pack 1.3.0.1
2015-6-8

Pack of buttons to create new folder and file.

New Folder
　　　Button to create a new folder.

New Text Document
　　　Buttons to create a new text file.

Create Sequentially Named
　　　Button to create files or folders numbered consecutively.
For ver 1024-.
dll.png One Key Send-To 1.3.0.0
2014-12-24

Provides keyboard shortcuts to copy / move selected files and folders to preset target.

For ver 1024.
dll.png Spacer 1.1.0.3
2015-10-24

ButtonBar item which inserts spring spacer.
Buttons can be placed at the right of toolbar with this.
dll.png Activate By Mouse Hover 1.3.0.1
2015-10-24

Activates a tab when mouse hovered.

For ver 1024. Supports tabs in extraviews.
dll.png Folder Memo 128.0.0.2
2014-12-24

You can make a note for each folder. Memo window is displayed if the current folder has memo. Start to make a memo by click 'Show folder memo' in tab context menu.
Data file is in C:\Users\UserName\AppData\Roaming\Quizo\QTTabBar\Plugins\Memo

128.0.0.1 An option to show memo by mouse hover over tabs.
128.0.0.2 Supports extra views. From this version, data file name contains version num, not to overwrite old data.

For ver 1024.
dll.png View mode slider button New! 2.0.0.0
2015-10-24

A button that mimics slider button to change icon size from Content to Extra Large Icon.

Sources of these plugins. (2015-10-24)

Old plugins for old QTTabBars