Brother Steve's Tin-Whistle Pages - One of the best online tin whistle tutorials. Packed with clear examples and insightful instruction, it's clearly the work of someone with a lot of teaching experience. The site is bilingual in English and French. Don't miss the excellent transcriptions of talented whistle players.
Ceolas Tin Whistle Guide - Overview of the tin whistle by Gerard Manning. Introduction to the instrument, resources, recordings, and purchasing information. This document is rather old, so purchasing information is well out of date.
Chiff and Fipple - A general site by Dale Wisely, the "Undisputed King of Internet Tin Whistle Journalism". Message board, newsletter archives, a tune of the month, whistle reviews, and information and links for both novice and experienced whistlers.
Comparison Recordings of Flutes and Whistles - James Peeples presents a number of MP3 files allowing the listener to compare the same tune played on different instruments.
The Flageolet Site - The flageolet site deals with all aspects of the flageolet, an older instrument similar to the whistle.
Flutes and Pennywhistles - Lark in the Morning's article on the care and feeding of flutes and pennywhistles.
How to Play Blues on an Irish Whistle - Simple explanation of fingering the blues scale on a tin whistle. Actual familiarity with the musical genre is left up to the reader.
Irish Modes and the "D" Tin Whistle - This article adds notation and whistle tablature to its clearly-written text to explain what exactly musical modes are, which modes you're likely to find in Irish music, and how to play them on "D" tin whistles.
The Kwela Project - Pennywhistle Jive from South Africa - from playing kwela to learning about music and culture in township South Africa
Learning to Whistle - Useful tips, observations, and experiences gained while learning to play the tin whistle. Updated regularly.
Pipers Grip: Irish Low Whistle - History, reviews, makers, players, and more.
Praise Whistlers Abroad - Community and message board for fellowship of Christian whistle players, offering mp3 files and related links.
Rob Greenway's Irish Flute Pages - Though the site is about flute technique, the description of vibrato, breathing, and ornamentation, is directly applicable to whistle as well.
The Scottish Whistle - A collection of Scottish tunes, an essay on whistling in Scottish music, and information on taking tin whistle classes in Scotland.
Sessioneer - A general site that includes a tin whistle guide, an index of regional session times and locations, a tune archive, and reviews of recordings.
Tin Whistle - Wikipedia article which gives a good introduction to the history and description of the tin whistle. A useful starting point for someone unfamiliar with the instrument.
Tinwhistle Fingerings Research Center - Includes a detailed fingering chart plus articles on scales and alternate fingerings, and a small but unique collection of tunes.
The Whistle Annex - Created by a beginning tinwhistler especially for beginning tinwhistlers, with links and guides to many whistling resources.
Whistle Reviews by the Wandering Whistler - The largest collection of tin whistle reviews by a single reviewer. Each detailed review follows a similar structure and includes audio samples for comparison.
Whistle This! - Every two weeks a new tune is posted. You can upload your own recording of the tune, comment on other recordings, or just listen.
Whistle Tutor - Tin whistle tutorial. Lessons and tips for performers of all levels of ability. [Tutorials use Flash]
Whistling Low - The Internet guide to the alto and tenor tin whistle. History, technique, instrument descriptions, reviews, news, and links.