Giga Tick is a fully responsive / mobile friendly WHMCS template
PreMadeKB - Readymade Knowlegebase Articles for WHMCS - With Images and 269+ Articles on cPanel, Softaculous, etc.
Box Chat is a fully responsive / mobile friendly WHMCS template
Payment Gateway Module for the Swiss PostFinance e-payment service
A custom WHMCS admin theme that enhances the user experience for your staff.
BBVA payment gateway
make sure your paid invoices stay saved even if you change the user information or decide to upgrade your PDF template…
Sermepa/Redsys payment gateway
Easily apply SEO data to your WHMCS template, directly from your WHMCS Administration panel. Includes support for Facebook and Twitter images.
Manage your online.net dedicated server using whmcs.
http://www.leaseweb.com/en server management addon
Teamspeak 3 & 5 server provisioning addon
Mumble server provisioning addon
Livedrive.com Cloud Storage Backup Solution for home and business backups
http://www.cloudberrylab.com/ backup provisioning addon
Enable your customers to create amazing looking websites by reselling Weebly directly through the WHMCS platform
Chat and Engage with Your Customers to Increase Conversions!
Sell And Automate Provisioning of VPN, VoIP & Proxy Services Based on FreeRADIUS
Track and Bill for your Projects using WHMCS
Build, License & Distribute Your Own Apps using WHMCS