Automattic

Nick Momrik

Beau Lebens

Tim Moore

Niall Kennedy

Display the latest Tweets from your Twitter accounts inside WordPress widgets. Customize Tweet displays using your site or theme CSS.
Customize the number of tweets displayed. Filter out @replies from your displayed tweets. Optionally include retweets. The widget plugin automatically links usernames, lists, and hashtags mentioned in Tweets to keep your readers on top of the full conversation.

Wickett Twitter Widget

Future upgrades to Wickett Twitter Widget will only be available in Jetpack. Jetpack connects your blog to the WordPress.com cloud, enabling awesome f …

fonglh

Unofficial plugin to replicate the Google Maps shortcode function on WordPress.com sites. Useful for users who are migrating from WordPress.com to self hosted WordPress.org sites and want their maps to continue working. This feature is explained at http://en.support.wordpress.com/google-maps/
Main benefits include:
<ul>
<li>Import your posts from WordPress.com without having to edit all your maps.</li>
<li>Continue adding maps to posts the way you used to do it.</li>
<li>Support for custom width and height settings.</li>
</ul>

Unofficial WordPress.com Google Maps Shortcode

Unofficial plugin to implement the Google Maps shortcode available on WordPress.com sites.

Wickett Twitter Widget vs Unofficial WordPress.com Google Maps Shortcode