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 …

jeremybmerrill

Enables a shortcode, [debate], that allows multiple blog contributors to add their contributions to a discussion in an individualized way by displaying a custom background color, name, and a gravatar. I appreciate your feedback!

DebateMaster

Enables a shortcode, [debate], that allows multiple blog contributors to add their contributions to a discussion.

Advance Guest Post vs DebateMaster