cPanel is the best control panel that we have ever used. Still, You can use CWP for users who can't afford the current cPanel pricing, it provides almost all the features offered by cPanel. You can find the demo installation on their website. It has a FAQ page which will help you sort out any questions and if you've more to ask, then please make use of their forum.
FASTPANEL is free of charge only for a period of at least 18 months. It still not support Incremental backups, PostgreSQL support, Integration of WAF based on ModSecurity, billing system like WHMCS, Blesta etc.