Devin Reams

If you reference venues on <a href="http://foursquare.com/" rel="nofollow ugc">foursquare</a> you may want to include the Publisher <a href="https://foursquare.com/buttons/savetofoursquare" rel="nofollow ugc">“Save to foursquare” button</a> inline within your WordPress posts.
This plugin is a simple shortcode that accepts two parameters:
<ul>
<li>uid = foursquare user ID (numeric) to appear as ‘referred’ by’ on foursquare once saved to a user’s list</li>
<li>vid = the venue’s ID (hash at the end of a venue URL)</li>
</ul>
This was built for my own purposes but am happy to accept pull requests <a href="https://github.com/devinreams/wp-save-to-foursquare-shortcode" rel="nofollow ugc">on GitHub</a> for any improvements to make this more useful to the community: https://github.com/devinreams/wp-save-to-foursquare-shortcode

Save to foursquare Shortcode

Add the "Save to foursquare" button to posts with a simple WordPress Shortcode.

Florian Beer

Displays venue names and icons of the latest Foursquare checkins. 
Requires Foursquare Username and Password filled out in the widget’s settings.

Foursquare Latest Checkins

Displays the users latest Foursquare checkins including venue icons as a sidebar widget.

Save to foursquare Shortcode vs Foursquare Latest Checkins