Mac Apps for File Server

Plex Media Server
Free

Dropbox
Free

Google Drive
Free

PS3 Media Server
Free

Universal Media Server
Free

Serviio
Free
Apache
Free

younity
Free

Rumpus
Free to try

iSedora Media Server
Free to try
Tenon WebTen
Free to try

QuickSaver for Dropbox
$1.99
Wing FTP Server
Free