The following are some of the main features of C1Splitter that you may find useful:

• Expand and Collapse Panels
  Just set one property to expand or collapse panels. Add visual effects such as images and mouse over styles to the splitter bar to represent a collapsed or expanded panel. See Collapsible and Expandable Panels for more information.
• Unlimited Nesting
  Organize massive amounts of data into one page using Splitter for ASP.NET Web Forms's nesting feature. Splitter for ASP.NET Web Forms enables you to nest multiple splits of any orientation type as well accommodate the resizing for the nested splitters when you resize the panel. See Compound Split for more information.
• Full Split
  You can create a full-size splitter by setting the fullSplit option toTrue. Resize your Web browser and observe how the wijsplitter widget expands or contracts fluidly.
• Theming
  With just a click of the SmartTag, change the splitter's look by selecting one of the 6 premium themes (Arctic, Midnight, Aristo, Rocket, Cobalt, and Sterling). Optionally, useThemeRoller from jQuery UI to create a customized theme!