Two remarkable websites have opened up Gregorian chant as never before, in both the old and new forms.
The first is JoguesChant.org, a site that provides full access to all Gregorian chant propers with scores and recordings of these chants. It is designed for the ordinary form of the Mass. This is both the music, fully public domain, and masterful audio presentations of these. This surely must give chant a big boost in parishes.
The second site is ReneGoupil.org. It provides the chant, audio, organ score, and sometimes even video. Both sites cover the full Church year.
Here is an example of a video that presents the EF introit, which was the introit last week in the OF.
18th Sunday after Pentecost: Introit from Corpus Christi Watershed on Vimeo.
The full books from which these chants were derived are also available for free download at the Church Music Association of America (musicasacra.com). What a lovely thing for technology to be used in service of the ancient liturgical arts.