Similar plugins

In alphabetical order:

• Inline Editor (abandoned)
• JE Editable
• WP Inline Edit
• WP Raptor
• WP User Frontend

Accessible:

• Fluid Accessible Rich Inline Edit
• Fluid Accessible Inline Edit

For creating posts etc.:

• Post From Site
• PostHaste
• wp-frontend-uploader

Other CMSes:

• django-inplace-edit