by Danny van Kooten on WordPress.org
Edit widget content using the default WordPress visual editor and media uploading functionality. Create widgets like you would create posts or pages.

Use the widget in one of your widget areas to show a widget block.
This plugin adds so called “Widget Blocks” to your website which you can easily display in your widget areas.
You can create or edit the widget blocks just like you would edit any post or page, with all the default WordPress editing functions enabled. This way, you can use the visual editor that comes with WordPress to format your widgets. You can even use media uploading to insert images and so forth.
Features:
Translators
If you have created your own language pack, or have an update of an existing one, you can send gettext PO and MO files to me so that I can bundle it into WYSIWYG Widgets. You can download the latest PO file here.
More information