Yesterday I uploaded to the Choral Public Domain Library a setting of the Kyrie which I originally planned to be part of a Missa Bone Pastor. I wrote this at Easter 2008, and while I think it is one on my more successful compositions, it became apparent that it sounds very silly and could not be performed as part of the liturgy.
The reason why is that it is based on the nursery rhyme 'Baa Baa Black Sheep' as the cantus firmus! While it may not be inappropriate for a mass dedicated to the Good Shepherd, one could imagine the reaction of the clergy on the sanctuary at a high mass on hearing it. Well, here is the webpage it is at, and you can listen to it here.
On a more serious note, today I have also just uploaded the Missa Brevis for 2 voices and organ I wrote four years ago: here is the webpage.