Considering WYSIWYG email editor

[hovea]

Tinymce is too heavy in busy sites.

Tinyeditor
JavaScript WYSIWYG Editor – TinyEditor - Web Development Blog

Nicedit
NicEdit - WYSIWYG Content Editor, Inline Rich Text Application

Could be alternative selection?

[SKaero]

It maybe possible to change the WYSIWYG editor with a plugin, but I haven't tried myself yet.