Here is a list of the widgets and some images to give you an idea of what they are:

• Actionslider

• Background

• Bubble

• Button

• Calendar

• Check

• Clock

• Colorselector

• Ctxpopup

• Datetime

• Dayselector

• Diskselector

• Entry

• File_Selector_Button

• File_Selector_Entry

• Fileselector

• Flip

• Flipselector

• Frame

• GLView
• Hover

• Hoversel

• Icon

• mapping

• Index

• Inwin

• List

• Label

• Map

• Mapbuf

• Menu

• Notify

• Panel

• Photo
• Photocam

• Popup

• Prefs

• Progress bar

• Radio

• Route
• SegmentControl

• Separator

• Slider

• Slideshow

• Spinner

• Thumb

• Toolbar

• Tooltips
• Video
• Web

• Win

The other two main groups in Elementary are:

• Infrastructure list - These are modules that deal with Elementary as a whole.
• Containers List - These are the containers which will hold the widgets.