Here is a list of the titles of the choral settings of the 25 Additional Collects:
(Note: underlined titles with links are published by RSCM.)

Advent

        As Your Kingdom Dawns                        The First Sunday of Advent
        Gift of the Christ-Child                            Christmas Eve


Christmas

        Your Birth At Bethlehem                         Christmas Day
        In the Stillness of This Night                    Christmas Night
        God Our Father                                       The Second Sunday of Christmas


Epiphany

        Creator of the Heavens                            Epiphany
        The Baptism of Christ                             The Baptism of Christ         
        Our Beginning and Our End                   The Second Sunday of Epiphany
        Lord Jesus Christ, Light of the Nations   The Presentation of Christ in the Temple
 

Ordinary Time

        Lord of the Hosts of Heaven                    The Fourth Sunday before Lent
        Almighty God, Give Us Reverence          The Second Sunday before Lent

 
Lent

        Our lives are laid open                             Ash Wednesday
        Merciful Lord, You Know Our Struggle    The Fourth Sunday of Lent


Holy Week

        True and Humble King                             Palm Sunday  (Organ accompaniment)
        May We Who Share His Table                  Maundy Thursday
        In the Depths of Our Isolation                   Easter Eve
        We See the Cost of Our Sin                     Good Friday

 
Easter                                 

        The Way to Life Stands Open                   Easter Day
        Risen Christ, You have Raised                  Ascension Day
        Sent by the Father                                    Pentacost     (Organ accompaniment)



Ordinary Time                    

        God of Truth                                           The First Sunday after Trinity
        Faithful Creator                                       The Second Sunday after Trinity
        Revive Your Church in Our Day              The Ninth Sunday after Trinity
        Almighty God you search us                  13th Sunday after Trinity
        God of Glory                                           4th Sunday before Advent 

Ordinary Time

        God our Saviour                                   The Third Sunday after Trinity
                                                                     (optional Organ accompaniment)

Special occasion
        Collect for Harvest Thanksgiving           "Creator God".  Harvest Thanksgiving
                                                                     A Cappella, (divisi SSAATBB)  
                                                                     Duration circa 2 minutes.