These days I had to install a DHCP service for an isolated network with Windows XP on computers.
I need it to statically associate the MAC addresses of some devices with the same IPs every time the devices are started up.
(IT scientists are lazy and do not to manually configure networking on the devices )

After 10-20 minutes of search I have found these two wonderful solutions:
- Tiny DHCP Server

Goods: easy to use,  GUI, associate MAC with IP at a click away, light
Bads: not so free as I thought

- DHCP Server DNS Server

Goods: free, stable, light
Bads: old school text config to associate MACs with IPs

Enjoy