yonisink

yPHPlista is a new plugin I wrote because I was unsatisfied with current ones integrating phplist with wordpress. this plugin does it best, and it does it with style. both ajax (“same page”) signup and gracefully degrading JS so your users can visit their normal subscription page.
For more information visit http://social-ink.net or http://www.social-ink.net/blog/yphplista-an-ajax-wordpress-plugin-for-phplist-integration
Please note, as with every plugin or theme modification, you should do a backup of your files beforehand. Although we’ve tested this across many installs, we are not responsible for anything it does to your system and do not guarantee support.

yPHPlista


this big text yPhplista is really not needed


ok but please without ads

yPHPlista integrates your PHPList install with beautiful AJAX.

vinzzb

This plugin imports forms from you PhpList host into wordpress. 
Your subscription forms can be used anywhere in wordpress using shortcodes. 
Custom user attributes defined in phplist are also taken into account. 
The plugin uses async calls (ajax) for registrations. You can fully customize the respone on success or failures.
NOTE: This plugin will only work with self hosted PhpList environments. It does not work with phplist.com accounts.
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PhpList Subber

Integrate your PhpList subscription forms in Wordpress, including user attributes in phpList.

yPHPlista vs PhpList Subber