The best replacement for media server is nas.

The best alternatives to media server are rated as following:
★★★★★  nas
★★★  htpc
★★★  tversity
★★  network share
★★  file server
★  video station
★  mediatomb
★  master server
★  medialink
★  video station synology
★  plex media center
★  plex
★  network storage
★  universal media server
  twonky
  home server
  serviio
  xbmc

Your alternative for media server is not listed? Suggest!
Speaking about media server, one probably shouldn't forget about xbmc.

Other search terms related to media server and their ratings are:
★★★★★ xbmc
★★ subtitles
★★ cinavia
★★ plex
★ nas
★ vlc
squeezebox
You have in mind a companion for media server and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of media server in all years. Click on graph for more.
media server
nas
htpc