MrXHellboy

This WordPress plugin (widget) will be shown when visitors are viewing a single post, category page or both. Otherwise, it wont be there at all. 
The widget contains a list of post titles from the same category(s) the visitor is viewing the post from, so the visitor is able to swiftly change posts by clicking on the titles shown. 
Posts published in multiple categories are taken care of just fine. I’ve introduced a new feature in version 1.6 which gives you the possibility to show all the categories the post has been published in or the category where the visitor has been spotted the last time(uses cookie).
The widget can be controlled with the following widget options:
<ul>
<li>Title (before the category name(s))</li>
<li>Exclude category(s) by ID</li>
<li>Exclude categories on: Single, Category, Both, None</li>
<li>Sticky posts on top: Yes | No</li>
<li>Show posts from year: a specific year or all years</li>
<li>Show widget on: categories | single posts | both</li>
<li>Show category title(s): Yes | No</li>
<li>Post has multiple categories – what now: Show all categories | Show the last category viewed</li>
<li>Show how many posts</li>
<li>Single posts view – Order: DESC | ASC</li>
<li>Single post view – Orderby: Author | Category | Date | ID | Random</li>
<li>Category view – Order:?DESC | ASC</li>
<li>Category view – Orderby: Author | Category | Date | ID | Random</li>
<li>Remove/Keep child categories</li>
</ul>
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Category Content

This Wordpress plugin (widget) will be shown when visitors are viewing a single post, category page or both. Otherwise, it wont be there at all.

fmarzocca

Particularly suitable to all multi-nested categories and multi-authors website, with lots of posts and complex category layout (i.e.: academic papers, newpapers articles, etc), as weel as for single-user websites (read below). This plugin allows the user to place a shortcode into any page and get rid of a long and nested menu/submenu to show all site’s posts (including custom post types assigned to a standard category). A customizable selector in the page will allow the reader to select grouping by Category/Author/Title.
Shortcode’s options include:
<ul>
<li>excluding any category from the list</li>
<li>excluding/including admin users from the list</li>
<li>single-user website usage</li>
<li>select what list(s) to display</li>
<li>limit number of posts in list output </li>
<li>Show (optional) post date</li>
<li>Show in reverse date order</li>
</ul>
Output grouped by Category will look like:
<pre><code>CAT1
 post1 AUTHOR
 SUBCAT1
 post2 AUTHOR
 post3 AUTHOR
 SUBCAT2
 post4 AUTHOR
 ...
 ...
</code></pre>
Shortcode generator
The plugin installs a new menu ACT List Shortcodes in Admin->Tools. The tool is a helper to automatically generate the required shortcode. It will parse the options and display the string to be copied and pasted into any page. Please refer to the plugin admin page for a full list of options.
Default manual usage:
[ACT-list]
all categories and subcategories post, excluding administrator’s posts, grouped by (upon selection) Category/Author/Title
Exclude categories:
[ACT-list exclude=”cat1-slug, cat2-slug, …”]
listed categories will be excluded. Categories must be listed with their slugnames.
Include admin’s posts:
[ACT-list admin=1]
this option will also include all admin’s posts in the list.
Single-user website:
[ACT-list singleuser=1]
this option is suited for websites with a single author (or when you don’t want to show the authors). It removes grouping by Authors and any author name. This option includes the admin=1 option, so that it will list any post in the website. You can still apply “excluding categories” option.
Select what list(s) to display
The parameter “show” will allow the admin to select what lists will be shown and if the dropdown selector is needed or not. i.e.:
[ACT-list show=”Category, Author”]
or
[ACT-list show=”Title, Category”]
Allowed terms for the “show” parameter are: Author, Title, Category.
Split the lists into separate pages
By selecting only one variable in the “show” parameter, you will be able to show only one list without the dropdown selector. This will enable you to put the 3 lists into separate pages, or separate tabs of the same page.
Page#1 (or tab#1) 
[ACT-list show=”Category”]
Page#2 (or tab#2) 
[ACT-list show=”Author”]
Page#3 (or tab#3) 
[ACT-list show=”Title”]
Limit the number of posts in the lists
If you have a large numbers of posts (>2,000), it could be convenient to limit the number of posts in the lists, including only a certain amount of the most recent posts. This can be achieved separately for the 3 lists using the following parameters: postspercategory, postsperauthor, totalpoststitle. i.e.:
[ACT-list show=”Category” postspercategory=”20″] will show only the 20 most recent posts for each category.
Show posts list in reverse date order
By default, the posts will be listed from newest to oldest. To change this behaviour, use the reverse-date=1 parameter.
Show posts date (v.>=2.7.0)
The date of the post could be printed out before the post name, optionally
<blockquote>
If you like the plugin, feel free to rate it (on the right side of this page) or <a href="https://www.paypal.com/cgi-bin/webscr?cmd=_s-xclick&hosted_button_id=4EH3N5XZJZCRQ" rel="nofollow ugc">donate via PayPal</a>. Thanks a lot! 🙂
</blockquote>

List all posts by Authors, nested Categories and Titles

This plugin lists all posts by Author, nested Categories and Title, allowing to place the lists in any page.

Category Content vs List all posts by Authors, nested Categories and Titles