The OpenSRS SiteLock module:
The best place to start if you need help with a specific product is to contact the developer. All WHMCS Marketplace developers have both a website and support URL listed.
Now you can sell our SSL and security products using WHMCS
Resell VPS & Cloud Dedicated Products from Liquid Web
Teamspeak 3 server provisioning addon
Designed exclusively for service providers to meet their customers’ needs, Acronis Backup Cloud is a proven, comprehensive, local, and cloud backup and recovery service. Free 30 day trial is available.
Integrate manager for Hetzner Dedicated and VPS servers