omarke85

This plugin will add additional fields in the profil of a user, they can fill in there birthday, choose if they want to share it and if they want to show there birthday. 
When saved, the system will generate a ICAL-file that can included in many calendar programs/plugins.
As admin you can see an overview of all birthdays, with upcoming, passed and with some info about, how many registered birthdays, the oldest, youngest, average age.
<blockquote>
<h4>Upgrade from 0.1.x to 0.1.4</h4>
If you upgrade to 0.1.4 please run the “rebuild birthdys”-script. This because of changes in storing files on the system. 
 When using 0.1.6 and you changes an options the rebuild will be done for you.
<h3>Caution: in version 0.1.3</h3>
For some reason there is 2 breakspaces in the wp-birthday-users.php at the end. Delete these to let the plugin work. (I try to fix it later)
</blockquote>
Version 0.1.7 introduce the posibility to show a widget on your page. This will show you a widget with the users whos birthday is today, and you can choose to show upcoming and past birthdays (and how many of it), also a downloadimage with to the ical.

WP Birthday Users

carman23

You or your members enter a birthdate in WordPress or BuddyPress. This plugin automatically sends an email to such members on their birthday.
You can customize the email that is sent to all Users.
You can request a notification email be sent to you for each birthday email that gets sent, so you know it happened and when.
If you want to contact the author, write to clawrick@gmail.com
Birthday Emails is currently available in English only, though you can customize the birthday email sent, in any language you wish.

Birthday Emails

Automatically send an email to WordPress or BuddyPress users on their birthday.

WP Birthday Users vs Birthday Emails