Little Widgets - HTML, CSS Framework with beautifully designed website widgets, popups, and forms.
Intercom - Intercom is a customer relationship management and messaging tool for web businesses. Build relationships with users to create loyal customers.
SnapWidget - SnapWidget is the best way to display your Instagram and Twitter photos on your website or blog.
Live Chat by Sumo.com - Instantly communicate with customers, prospects & visitors
GetSiteControl - Website popup builder & email marketing suite for ecommerce
GoSquared Live Chat - Beautiful, simple, and free live chat for your website