husani

Ever want your own shortcuts without mucking about with permalink structures? The Link Shortcut plugin allows you to create short (random numbers and letters, or short words) URLs under your blog’s domain that redirect (301 or 302, your choice) a user to other pages, either in your site or on another site.
In other words, instead of sending this url to the author’s plugin page: 
http://www.husani.com/ventures/wordpress-plugins/linkshortcut/
This shortcut could be created simply by installing this plugin and adding a link, via the same traditional WordPress UI we all know and love: 
http://www.husani.com/link123
You can also specify a specific “subdirectory” to be present in all Link Shortcut URLs: yourblog/go/STRING, for example.
YOU MUST USE NON-UGLY PERMALINKS FOR THIS PLUGIN TO WORK. Your permalink structure cannot be yourblog.com?p=84, it must be date-based, name-based, etc.
IMPORTANT: Link Shortcut creates a table inside your database. Upon deactivation, the plugin creates a backup table and copies records to it before removing the main table. If you decide to activate the plugin again — or have installed an upgrade — it automatically copies your backed up links to the newly created table. You can also delete the backup table if you remove Link Shortcut permanently.
Changelog:
<ul>
<li>1.4:
<ul>
<li>Added configurable Redirect-Type (301, 302)</li>
</ul>
</li>
<li>1.3:
<ul>
<li>Added ability to set default length</li>
<li>Added ability to set directory name inside URL (yourblog.com/go/993ldx)</li>
<li>Added data backup on plugin deactivation (read Installation for more details)</li>
<li>Using _SERVER instead of WP_Query to account for WP version differences</li>
</ul>
</li>
<li>1.2:
<ul>
<li>Fixed WP 2.7 vs 2.7.1 bug</li>
</ul>
</li>
<li>1.1:
<ul>
<li>Fixed directory name bug</li>
</ul>
</li>
</ul>
Link Shortcut is released to the WordPress community under the GPL. Please feel free to modify as you see fit, and if you find this plugin useful, donate to the author. All feedback is welcome at wordpressplugins@husani.com, and you can visit Husani’s website at http://www.husani.com.

Link Shortcut

Make TinyURL-like URLs (you.com/33ks8s) that redirect to pages inside / outside your blog.  Can also create human-readable aliases (you.com/facebook).

mahlzeit

You invoke a macro by typing a special command in your blog post:
[[keyword]]
Upon reading this command, the PHP function named “macro_keyword” is called and 
its output is inserted on the page.
You can also pass a parameter to the macro:
[[keyword][param]]
Or multiple parameters:
[[keyword][param1][param2]]
The parameters are separated by the ][ characters, or rather, you can look at it 
as a list of things in brackets surrounded by another pair of brackets.
The PHP file for this plugin has an example function that shows you how to write 
macros. It is called “[[test]]” and is defined in the function “macro_test”. The 
“test” macro takes up to two parameters, both optional.
New in 1.1: If you want to include the macros in RSS content, you will have to 
define a second function named “macro_rss_keyword”. If this function is not 
present, the macro will not be included in the RSS output.
<h3>Known Issues</h3>
<ul>
<li>
This is a quick hack, not extensively tested but it seems to work for me.
</li>
<li>
WordPress already adds the
</li>
</ul>
 and 
tags around the [[keyword]] before 
 the plugin is called — the plugin doesn’t remove those.
<ul>
<li>
You can’t use ” and ‘ (and possibly a handful of other characters) in 
parameters because WordPress replaces them with curly quotes before the 
plugin has a chance to parse them. You can use spaces, though.
</li>
<li>
Maybe pass an $is_rss parameter instead of using 2 separate functions?
</li>
<li>
Maybe change syntax to:  ?!
</li>
</ul>
<h3>About</h3>
<ul>
<li>
Version 1.1 (8 June 2007) – The parameter separator is now ][ instead of |. 
Added macro_rss_* functions for the RSS content.
</li>
<li>
Version 1.0 (7 June 2007) – First version
</li>
</ul>
Written by Matthijs Hollemans
http://www.hollemansproductions.com/wordpress-macro-expander-plugin.html

Macro Expander

Replaces user-defined keywords in a blog post with the output from the corresponding user-defined PHP function.

Link Shortcut vs Macro Expander