Samer Bechara

This plugin allows your website visitors to set the number of posts they see per page. It will insert a form at the top of your posts page in order to allow your website visitors to quickly set the number of posts they want to see per page.
Detailed Features
User Posts Per Page allows your website visitors to set the number of posts per page, and remembers that number everytime they reach your website.
<ul>
<li>Works with posts, pages and custom post types </li>
<li>Works on Category pages, tag pages, author pages, archive pages, and custom post type archive pages.</li>
<li>Number of posts per page remembered for logged in users</li>
<li>Cookie set for non-logged in users to remember settings</li>
<li>On network installs, network administrator is able to set the default number of posts per page across the whole network</li>
</ul>
Plugin Usage
<ul>
<li>Go to Appearance->Widgets and add your widget to any sidebar of any archive page</li>
<li>Alternatively, you can use the shortcode [user_posts_per_page] to insert this in your theme using 
the function <code>echo do_shortcode('[user_posts_per_page]');</code></li>
</ul>

User Posts Per Page

Allows the user to dynamically set the number of posts to show per page on category pages, tag pages, author pages and all other archive pages.

corlax

Running MaketPress Store and want to provide your user to publish product from frontend then this plugin will help you to do this. Just install activate and add your shortcode for start.
** Features:- **
<ul>
<li>Edit Post</li>
<li>Support Membership Plugin</li>
<li>Add Custom Field</li>
<li>Ajax Upload</li>
<li>Ajax Form Validation</li>
<li>disable Visual editor for content</li>
<li>enable Visual editor for excerpt</li>
<li>Help Text For Tag</li>
<li>Limit Number Of Post</li>
<li>Other bugs fixs (Category ajax error fix, PHP error, Login Issue, Change Submit Button Text)</li>
<li>Let User Submit Post From Frontend</li>
<li>Support Download File for digital download</li>
<li>support price and sale price (for discount)</li>
<li>Post Type and taxnomy Support</li>
<li>Publish post or Pending post</li>
<li>Enable/disable Captcha</li>
<li>Success Message</li>
</ul>

Marketpress Frontend

Running MaketPress Store  and want to provide your user to publish product from frontend then this plugin will help you to do this.

User Posts Per Page vs Marketpress Frontend