A Collection of Chaplets
Prayers said with several chaplets and "rosaries".
Blessed Sacrament Chaplet
A chaplet that honors the Lord's True Presence in the Blessed Sacrament.
Catholic Encyclopedia: The Franciscan Crown
Article about the Franciscan Crown, also known as the Seraphic Rosary. Brief history, general description of how one prays this chaplet.
Catholic Encyclopedia: Use of Beads at Prayers
Essay on chaplets, rosaries, prayer ropes, prayer cords. Brief treatment of the use of beads in prayer by non-Christians.
Catholic Prayer Library - Rosaries and Chaplets
A library of prayers to be said on Catholic prayer beads, including several rosaries (Dominican, Franciscan, Servite) and a variety of devotional chaplets (to Our Lady, Our Lord, Saints and Angels). Each is provided in printable format.
Chaplet of St. Joseph
For those devoted to the Holy Family. Asks the protection and intercession of St. Joseph. Will take just over a minute to load on a 14.4 modem.
Chaplet of the Holy Wounds
The prayers and the history of this devotion.
Chaplets
A collection of chaplets for private devotions to Jesus, the Blessed Virgin Mary, and the saints.
Prayerbook: Chaplets
A collection of chaplets in honor of our Lord, our Lady, and the saints.
Saint Pio chaplet
This chaplet of Padre Pio - now Saint Pio - can be prayed on a rosary.
Scriptural Rosary of the Seven Sorrows
Devotion to the Seven Sorrows of Mary goes back to the Middle Ages. Includes instructions and scriptural meditations.
The Angelic Trisagion
Three sets of nine beads each. Joining the angels' praise of the Trinity.
Various Chaplets
Description of various chaplets other than the rosary: what they look like, what prayers are said, historical background if known to the author. As this article says, some are of dubious value.