Please,
recomend Widget for using with following purposes:
  • Edit text In the widget, as in a text editor
  • Links in the text
  • Images in the text (desirable)

Editing features:
  • Editable Links: straight from the widget to change the title of links.
  • Pressing "Enter" on link - go to the link target

Of course, the complete widget does exists.
What to use as a basis.

Thanks!