Links:

A few Irish tunes - A few Jigs, Reels and a Polka and Hornpipe by Alan Dawson.
Accordion Man's Polish MIDI Page - Polish polka tunes, some by the Accordian Man himself.
Allen's MIDI Page - Wide ranging ethnic music, including and music from Germany, Ireland, Scotland, and China. Polkas, too.
Amsterdamse Blaas Kapel - "Egerländer-music" from Bohemia, "sometimes happy, sometimes sad, with many polka's and waltzes".
Ancient Irish tunes - Annotated collection of 30 MIDI encoded tunes from the 18th and 19th centuries.
Bagpipes at Best: Bagpipe MIDI - A big collection of tunes for the Scottish Great Highland Bagpipe.
Balinese Gamelan Rhythms - Includes MIDI files of the traditional Balinese gamelan (percussion ensemble).
Cajun Land MIDIs - Almost a dozen Cajun tunes selected by the Accordian Man.
Celtic Tunes in MIDIs - Wide variety of Celtic tunes sequenced by Ron Clarke. Has a single .ZIP file with words and MIDIs.
Congregation Etz Chaim MIDI Page - Jewish and other ethnic MIDI files created, arranged, and sequenced by Michael Greenspan.
Croatian MIDI Collection - "MIDI Maniac" has collected over 100 Croatian and Yugoslav tunes.
Ethnic, folkdance and world music - Folk tunes from twenty diverse countries, from Armenia to Turkey.
Folk MIDI files from Pike's Peak Church - A page of "inspiring" folk music "pick-me-ups".
Folk Midi Radio - Automatically play 400 midi sequences in four folk 'channels'.
Folk Songs - Folk songs from around the world, from America to India.
Folk, songs and tunes. - Over a dozen nicely annotated folk tunes "picked up" from various sources.
Folksongs and Ballads of the Appalachians and England - Original arrangements of folksongs and ballads from the Appalachian Mountains of the United States and from England.
Folksongs of Europe - Large archive of folksongs, hymns, war songs, and sea songs from Austria, England, France, Germany, Ireland, Scotland, the US, and Wales.
Hawaiian Contradancers - Traditional contradances --chestnuts-- usually danced to particular tunes, with MIDI and text versions.
Henk Smith's Ethnic MIDI Pages - Wide coverage - Arabic, Chinese, Turkish, Dutch, Portuguese, Bulgarian, Greek, Russian and Merengue.
Irish MIDI Archive - "For the Irish in all of us". Two collections, many with lyrics.
Irish, Scottish, Shetland and European Session Tunes - Irish, Scottish and Shetland folk music in MIDI and 'abc' (text) formats.
Israel Gimel -- Free MIDI Library - Israeli, Jewish, Yiddish, Hebrew, Folk, Cultural music MIDI Library. Includes holiday section.
Japanese Traditional & Folk Songs - A simple page of Japanese folk music.
Jerry's Folk and Traditional - A page of 25 classic American and English folk tunes.
Laura's MIDI Heaven - Over a hundred traditionals.Also accesses separate pages of English, Irish, Scottish and Welsh folk tunes.
MIDI Folk Music - Simple, eclectic mix of folk tunes from ten countries.
MIDI Music Sing Along Songbook - Popular MIDI music songs, with lyrics, in a sing along songbook with graphics.
MIDI Page Portugal - Over 30 traditional and original portuguese MIDI tunes.
Marucho's Folkdance - A dozen tunes from Hungary, Macedonia, Israel, and Turkey, all sequenced by Marucho.
Musikskolan Folkmusic - Over 40 Swedish folk tunes organized by region.
National Anthems - National anthems of the world with texts and flags.
Nick Chrysos Ethnic Midi Page - Collections of MIDI files from 70 countries for downloading as zip files.
Northumbrian Folk Music - Northumbrian (north east England) MIDI tunes along with references to music books.
Piet's MIDI Page - Piet's favorite Dutch, Folk, St. Nicholas and Christmas tunes.
Pipe and Drum Midi Page - A simple collection of a dozen or so classic Celtic tunes.
Polish Folklore - Ten Polish folk tunes.
Scottish Folk Music - Collection of traditional Scottish tunes from "Auld Lang Syne" to "Will Ye No Come Back Again."
Simple Gifts Mandolin Tablature Archive - Includes MIDI files and mandolin tabs for classic folk songs.
Slovak Folk Music - Thirty-five Slovakian folk tunes, about half with sheet-music gifs.
Swedish Folk Songs in MIDI format - Nine Swedish folk songs with lyrics.
Taylor's Traditional Tunebook - Over 500 traditional tunes from 1600 to 1900 from Scotland, Ireland, Wales, England and "the Colonies" - includes lyrics and historical information.
The Island - MIDIs and Links - Celtic and American folk tunes among other things (holiday and surfing).
The MIDI Folk Jukebox - Three sets of nine American/Old World folk classics performed by Massachusetts group "Plainfolk".
The Other Side - Mostly Swedish folk music and traditional music in modern styles, often as reggae tunes.
Turkish MIDI & Karaoke Page - Traditional Turkish music, download as zip files.
Turkish MIDI Files - Abdullah presents a few unique Turkish tunes.
Virtual Pipes - "Pipe Band" music written by the site owner and by others.
Volkslieder, German and other Folksongs - This is the classic folk music and culture site. Thousands of MIDI-encoded folk tunes from around the world.