WHMCS Pricing Sliders and Comparison Tables
WHMCS Client Area with API (WCAP) : This will bring ordering functions and WHMCS client area to WordPress. Users will not link to WHMCS anymore, and whole order process will complete on WordPress site including user login/ registration if needed.
WHMCS Cart & Order Pages (WCOP) : has beautifully designed order pages, which are feature-rich, user-friendly and functional. Order pages are fully configurable and multiple order templates are available. It also supports merchant gateways.