Instagram is a free photo-sharing app you can get on your iPhone which has become really popular over the last year or so. You snap a photo, then apply one of the built-in filter effects to it and then upload it - you have followers like Twitter who can see your updates and you also have the option to share the photos on Twitter / Facebook etc.
There are a number of free WordPress plugins available which will allow you to display your instagram photos on your blog, so lets take a look at them...
Instagram for WordPress
Simple sidebar widget that shows Your latest 20 instagr.am pictures and picture embedder. Requires PHP curl extension.
Instagram Gallery Widget
Instagram Gallery Widget (IGW) lets you display your beautiful Instagr.am pictures in a simple and elegant gallery onto your WordPress website. You can drag multiple widget instances and configure each one with different settings. You can also use custom PHP code to insert the widget in any part of your theme or if you prefer, you can embed the special shortcode.
This plugin gets a users most recent activity, up to 10, and displays them in a WordPress Widget. It has the option to display likes and comments also. It creates a widget where all the settings can be adjusted. Recently added support for different size images and image linking.
Instagram Feed WD
This plugin allows you to show image feeds from one or multiple Instagram accounts on your site. As soon as you add a photo to the connected Instagram account, you will see it shown via this plugin on your website.
Easily embed your Instagram photos into WordPress posts (or pages) by placing the instagram url on its own line. For more control, wrap the url in the embed shortcode and pass it one of three values via the size attribute.
Display your Instagram photos in a sidebar widget, post or pages or inlcude a single Instagram photo via the Instagram URL in one of your posts. Furthermore create your own Instagram gallery with Instapress' paging functionality. It makes use of jQuery's fancybox plugin to display a nice slideshow for your images.
Instagrate to WordPress
The Instagrate to WordPress plugin allows you to automatically integrate your Instagram account with your WordPress blog.
InstagramWidget is a small, light-weight plugin that brings your latest Instagram photos to your WordPress blog.
This is insta.SHOW, a plugin for displaying your instagram content in a wordpress page! Simply install this plugin into your WordPress website, make some settings and display your wonderful photos fromInstagram.