Both Sr. Stacy and Sr. Sarah have composed many beautiful songs to help us in worship.  They both publish through ILP Music (International Liturgy Publications).  Here is a sampling of their music.
"In Paradisium" written and played by Sr. Stacy, sung by Sr. Rachel.  

Also published:

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Collection of 4 songs designed to teach the Books of the Old Testament and the Ten Commandments (Catholic listings), the Stages of Salvation (per Jeff Cavins), and the Beatitudes.
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Sr. Stacy's Mass of the Incarnate Word.