You can get free hymn music by visiting websites such as ScriptureSongs.net, HymnSite.com, HymnServe and PDHymns.com. ScriptureSongs.net lets you download the MP3 files of hymns for free. It also provides chords and lyrics for the songs in .pdf form.
HymnSite.com offers a searchable collection of hymn texts and MIDI files. The site changes the look of its website and playlist according to the season.
HymnServe offers free downloadable hymn accompaniments in MP3 format. The accompaniments can be used at church services or to supplement existing hymnals and publications.
PDHymns.com offers printable sheet music and MIDI files for the public domain hymns posted on its website.