It is useful because it automates a lot of things you can easily forget to implement (like incremental or backwards search).
 
Fully functional
Source: Included

• TTB2KToolbarList + AutoVisibility List Item (TTBAVListItem) - The TTB2KToolbarList is a Helper for the AutoVisibility List Item. The AutoVisibility List Item (used in a Toolbar-Menu for example) creates a List of all closeable Toolbars with the ability to show/hide them. No more forgeting to create an Visibility-Item for your new Toolbar.
• TTB2KCustomizeDialog + CustomizeDialog Item (TTBCustomizeDialogItem) - The CustomizeDialog gives your users the ability to change the Look-N-Feel of your program. You can define, what they are able to change (Toolbars, Menus, Docks, Backgrounds). All with a handy little Dialog like in many other programs (Toolbar -> Customize...). You can select the language (English or German). The CustomizeDialogItem is for use as a menu- or toolbar-Button and starts the Customize-Dialog.
• TTB2KAutoStateSave - Once dropped on the form with your Toolbar2000 and activated (don’t forget to set the parameters), it stores and restores the most settings of the Toolbar2000 on creating/destroying the Window. Positions, customizing via the CustomizeDialog, floating, visibility, almost everything.

• Nice DockSite components can be placed on top, left, right and bottom sides of the form.
• They provide all the functionality needed to easy arrange the ToolBars appropriate to the alignment of the Dock Site - top, left, right or bottom.
• Also accept Tool Bars by docking.
• Locking of Doc Sites prevents moving of the Tool Bars inside.
• Pushing of Tool Bars.
• Different Tool Bar heights for a row.
• Vertical and horizontal Tool Bars.
• Hide and show Tool Bars.
• Tool Bar as system menu.
• Floating windows are supported.
• Horizontal and vertical text for Tool Button.
• Can show image in Tool Button, on the left, top, right, bottom of the text.
• Work with actions.
• Gradient colors.
• Auto apply colors to the Tool Bars in a Dock Site.
• Save and Load the arrangement of the toolbars. Also if they are visible or not.

Main features:

• Main types of controls possible for toolbar are used.
• XP themes support.
• Transparent bitmaps in buttons.
• Save clipboard before PasteFace and restore it after.

Documentation and little demo project included.

Tested with Toolbar2000 ver. 2.1.5 to 2.1.8 and TBX ver. 2.1 beta1.
 
Fully functional
Source: Included

Main features:

• XP themes support.
• Chevron support.
• Resizeable textbox.
• Solved the problem with accelerator keys (BACKSPACE, etc.) and hints.
• TAB key support.
• After installation the toolbar appears in the separate line.
• Gradient background support.
• Buttons images with alpha channel.
• Hot button images.
• Access to current page (HTML document).
• All Windows versions (x32, x64) .
• All Internet Explorer versions (5,6,7,8). .

In addition to Toolbar2000 features TBX provides:

• Support for native and Windows XP themes for all components;
• Customizable layout for toolbar items;
• Variation of font sizes;
• Multi-line captions;
• Combo and list boxes embedded in menus or toolbars;
• Color selectors;
• Toolbars;
• Dockable panels (similar to task bars in Office XP);
• Page scrollers;
• as well as many other features.

Some of its features include:

• Office 2000-style draggable, dockable toolbars:
• Toolbars can smoothly move as they are dragged (no dragging rectangle).
• Toolbars that go partially off the edge of the form can display a chevron button that brings up a popup window exposing the obscured items.
• Toolbar items can optionally wrap into multiple rows like Office's menu bar.
• Toolbars are no longer be required to be placed on a dock; menus and toolbars can be placed anywhere you need them.
• Vertical text on vertically-docked toolbars.
• Office 2000-style menus
• There is no clear distinction between menus and toolbars, giving you the utmost in flexibility.
• Toolbars can contain menus, menu bars can contain buttons, and they can share the same items.

Features:

• Toolbars can be dragged and docked to any side of a form, or can be left floating.
• Multiple toolbars can lined up side-by-side or in rows.
• Full source code for customization if necessary.
• Includes a TToolbarButton97 control that looks and works just like the buttons in Office 97.
• Includes a TEdit97 control for creating Office 97-style edit controls on toolbars.
• Ability to save and load its position from the registry.
• Tested and certified to work on Windows 95, NT 4.0, and 3.51, without requiring the new COMCTL32.DLL, unlike Delphi 3's TToolBar and TCoolBar components.