Maštarija

Do you often need to create small pieces of content that should be present on e.g. every product page, but don’t justify writing a full on plugin?
Do you mostly work with designers or users that sometimes need to update some of that content, but they don’t know their way through Git, FTP or code in general?
If you’ve answered yes to any of those two questions then this plugin is for you!
Heckler allows you to create reusable pieces of code or text and execute / display them on any wordpress hook (after <code>init</code>) or use them as a simple shortcode within your content.
If you have some coding skills, you can programm a rule which determines if the text should be shown, or the code should be hooked or executed.
As an added bonus, there’s even a VIM mode in the code editor to make your life as a developer in this world of makeshift plugins just a little more bearable.
If you wish to contribute to this wonderfully horrible plugin you can do so on its <a href="https://github.com/mastarija/heckler" rel="nofollow ugc">GitHub repository</a>.

Heckler

Create custom text and code snippets, and attach them to hooks or use them as short codes, along with programmable display rules.

stuartobrien

cxThemes

Up until now the way theme and plugin developers find where to hook into with their add_action() and add_filter() functions is either to search through the WordPress code base, or find find a reference to the hook in the codex.
What Simply Show Hooks does is give you a simpler way to see these hooks by displaying them in-line on the page that you are on. All that’s left to do then is copy the hook you need, and paste it in to your add_action and add_filter functions like this: 
add_action( ‘wp_enqueue_scripts’, ‘my_enqueue_scripts_action’ ); 
add_filter( ‘the_title’, ‘my_the_title_filter’ );
I made this plugin so I could find WordPress hooks quicker and I use it all the time, so I thought I’d share it and see if it could help others.
Enjoy!
Please note that in odd cases, due to the nature of actions and filters, the plugin may display a hook in place that disrupts the display of your site – in which case we always display the ‘Hide Hooks’ button so you can switch it back off. This won’t disrupt the look of you site to anyone but you so don’t worry.

Simply Show Hooks

Good

Simply Show Hooks helps theme and plugin developers to quickly see where all the action and filter hooks are on any WordPress page.

Heckler vs Simply Show Hooks