From the developer: "Ability Server is an HTTP, POP3, SMTP (incoming and outgoing) and FTP server all rolled into one program. It's designed for people who want to host their own website and run their own mail server. Using its HTTP server, you can serve web pages and files to the internet or your LAN (the program can even run multiple domains/sub-domains). By using its FTP server, you can remotely control the website and even have access to chosen folders on the hard drive via multiple login accounts. The program can also handle your emails, by using its SMTP server to receive incoming mail from the internet and then allowing you to download them via its POP3 server. Ability can also act as an outgoing email server by relaying emails onto your ISP's SMTP server. This program is very easy to setup and because it's a stand-alone program, no installation is required."