Button
A Button that supports a Confirmation message before submitting a form.
Image
An Image that allows you to set the MouseOverImageUrl property.
ImageButton
An ImageButton that supports a Confirmation message before submitting a form and a MouseOverImageUrl.
ImageCheckBox
A CheckBox that renders itself as an image either checked or unchecked. It also supports MouseOverImageUrl for both states.
MyObjectDataSource
An ObjectDataSource that supports build in sorting and filtering of returned objects.
CompareValidator
A CompareValidator that supports displaying error messages as an image.
RequiredFieldValidator
A RequiredFieldValidator that supports displaying error messages as an image.
PageParameter
A parameter that can be used in DataSource controls parameter collections such as SelectParameters. It allows you to get parameters from properties of a page.
TemplateControlParameter
A parameter that can be used in DataSource controls parameter collections such as SelectParameters. It allows you to get parameters from properties of a nearest TemplateControl.
http://vaultofthoughts.net/ASPNETControlsPack.aspx