Field Pack gives you a handful of useful little fieldtypes.
Also adding basic validation for the publish page.
Routing for ExpressionEngine - separate your URLs from your templates for smarter, cleaner code. Freebie's tougher older brother.
Using FreeMember, you can finally release your member templates from the shackles of "member profile templates", without dropping all your cash on basic CMS functionality.
An ExpressionEngine extension that adds an author filter to the edit entries screen.
Feed Parser is a free plugin for ExpressionEngine 2 to fetch and read XML-based feeds and API results and display the contents in your templates.
Easily configure how your SSL certificate is used in combination with EE. Supports HSTS.
Flickr for ExpressionEngine happily marries Flickr and your EE-powered website. The add-on gives you several options for integrating Flickr - a Flickr Fieldtype, a handful of template tags, and Wygwam/Matrix compatibility.
Outputs an unordered list of forward/reverse relationship links with no duplicates.
Lists all the files from the directory you pass it, which are linked to automatically.
Defaults the custom field formatting type to "None" for new custom fields, and switches "Automatically turn URLs and email addresses into links?" to "No" when editing Channel Preferences.
Field Value allows you to output values of fields of a certain entry without using exp:weblog:entries or exp:channel:entries tag.
Fanceebox is a add-on for ExpressionEngine 2.x. It's main purpose is to allow for fancybox.net style lightbox popups in the control panel. You can then create popups for your custom fields' labels. This is a nice feature for settings and instructions so your clients have them right where they need them.
Returns form fields and labels based on Matrix entries.
Return Facebook page like or share count.
This plugin performs a 301 redirect to your 404 page instead of just displaying the 404 template.
This addon allows you to pull photos from a public facing Facebook page using Facebook Graph. Gives you a tag pair to place the photos where-ever you would like.
This small plugin shows emails sent with Firemail.
Format text, uppercase, lowercase, italic, bold
If you have a set number of spots on your page that needs to be filled but your channel doesn't have enough entries to output, this will let you fill the rest.