If you are looking for enterprise-grade or more modern Linux-based solutions: Kea DHCP - ISC

: A robust open-source option available for both Windows and Linux. It supports advanced features like multi-subnet management, relay agents, and PXE boot.

: A favorite among network administrators, this open-source tool is a "Swiss Army knife" for networking. It includes a DHCP server alongside TFTP, DNS, and Syslog servers.

For users on Windows who need a standalone application rather than a full Windows Server installation, these are the most popular choices: