Does what it supposes to do and a lot more, works great for us.
Cross browser, cross platform
Supports all popular browsers:
IE 6.0+, FireFox 1.0+, Mozilla 1.3+, Opera 7.2+, Safari 1.3+ and Chrome;
Supports both Horizontal and Vertical layout
Set the splitter to be horizontal or vertical with a single property.
Or nesting them to implement complex layout;
Supports Auto Fill Browser Window
Can automatically resize to fill the whole browser window, or
fill the browser window but leave space on any of the four sides;
Support Expanding/Collapsing Splitter Pane
Allow user to expand/collapse the splitter pane with a single click.
Persisting Layout State
Splitter position and scroll position are automatically persisted
during postback. These states are reflected through a few properties.
You can easily implement interface customization solutions based on