Nginx, created by Igor Sysoev in 2004 and headquartered in San Francisco, is the world's most widely used web server and reverse proxy, powering 33%+ of all websites.
WebConfig is a free open-source web server configuration management panel offering graphical management of Apache and Nginx, SSL certificates, and website configuration across major Linux distributions for budget-conscious webmasters and SMBs.
RunCloud, founded in 2016 in Malaysia, is a PHP-focused cloud server management panel supporting one-click connection to 10+ cloud platforms including DigitalOcean and AWS, with a free plan for 1 server and paid plans from about $12.5/month per server for WordPress and Laravel developers.
Founded in 2017 in the US, GridPane is a WordPress hosting platform hosting 120,000+ WordPress websites, built on your own VPS with a high-performance stack, white-label support, and free migrations for agencies and developers.
CloudPanel is a free open-source server control panel from Berlin, Germany, with 250,000+ server installations worldwide, running on as little as 1 core and 2GB RAM, built on a lightweight NGINX/PHP-FPM stack with one-click WordPress deployment and free SSL.
CentOS Web Panel (now Control Web Panel) is a free open-source server control panel running on 10,000+ dedicated servers and VPS, with an Apache/Nginx/mail stack and Mod Security protection for small teams managing CentOS/AlmaLinux hosts.
Froxlor is an open-source hosting control panel released in 2009 under LGPL, lightweight enough to run on a 256MB VPS, supporting Nginx/Apache, per-domain PHP management, and automatic Let's Encrypt SSL as a free server management option.
ClusterCS is a high-availability cloud server cluster management panel from Soft Dreams (Romania), building HA clusters on any cloud provider, with single servers from $7.2/30 days on hourly billing and a $70 free trial credit.