BinaryComboBox .NET© - An Extended and feature-rich "ComboBox" control for the Winforms .NET platform.

Feature list:

In addition to the standard .NET framework’s ComboBox functionality, BinaryComboBox .NET offers the following rich features:
1. Multi-Column drop-down list.
2. ComboBox text AutoCompletion
Also, the control exposes a special property, to let the user decide whether the AutoCompletion feature will be case-sensitive or not.
Also, the autocompletion feature is available in data-bound mode as well!
3. Image Support: Now you can show images next to the items on the drop down list.
4. "Read-only" support while being in DropDown mode.
5. Full support for both Data bound and unbound modes
6. Control painting with custom colors (with Alpha-blending support)
7. Automatic and instant support for a "Drivelist" and "Fontlist" combobox 8. Works with both data-bound and unbound modes!
And many more features...