corlax

This plugin help your visitor to publish post and from frontend anywhere on your site. this plugin have so many feature like guest posting, captcha, upload image, any custom post-type, taxonomy etc. 
Features:- 
Let visitors submit posts from anywhere on your site 
Easy integration shortcode to display the submission form 
captcha support protect from spam 
Post submissions may include title, category, author, post and image(s) 
Customize label In front End 
Enable/disable option for hide any option title, category, author, post and image(s)
Extra Features:- 
Post Type and taxnomy Support 
Publish post or Pending post 
Enable/disable Captcha 
Enable/disable Guest Posting 
Success Message 
Image size

Advance Guest Post

This plugin help your visitor to publish post and from frontend anywhere on your site. this plugin have so many feature like guest posting, captcha, u …

jcovington

Writescreen allows users who are posting to focus solely on their content, without being distracted by the rest of the WordPress interface. This plugin is for users who want a minimal, clutter-free edit view.
<h3>Disclaimers</h3>
Writescreen has been tested on Chrome 10, Firefox 4 and Safari 5 on Mac OSX as well as Chrome 10, Firefox 4 and Internet Explorer 8 (IE 8 Standards Mode) on PC. Other browsers may not behave as expected.
If other plugins have been used to modify or extend the functionality of the post edit screen, Writescreen may not behave as expected.

Writescreen

Provides a full browser window view of the post edit screen, for an uncluttered posting experience.

Advance Guest Post vs Writescreen