Sourcing and selecting appropriate music for small choirs can be difficult. Here you’ll find a number of pointers and even some free resources.

Sunday by Sunday – The RSCM publishes a resource entitled Sunday by Sunday. This is an excellent way of finding music appropriate to a particular season or Sunday in the the year. It’s a resource that is available to members but some material is available free of charge.

The ChoralWiki, Choral Public Domain Library (CPDL) is a great resource of free material, but you need to know what you’re looking for first. If it’s commonly in use and out of copyright (the composer / arranger died more than 70 years ago) then you may very well find it here. There’s a list of suggested music by season here

Some resources recommended by Herefordshire Churches

AdventWhen all is dark – Charlston Creator of the stars of night  
Advent Prose (plainsong)
Many more suggestions here
Unaccompanied

Plainchant
Christmas The Rose by Ola Gjeilo Also Advent
EpiphanyEastern Monarchs, Sages Three by Laurence Caldecote
Lent / PassiontideO saviour of the world – GossSimple 4-part with or without organ
EasterNow the green blade riseth *     O sons and daughters – Walford Davies

The Gardener at the Tomb by Shayla Blake
In many hymn books – can be sung in harmony, unison unaccompanied, with a simple drone (tonic and fifth) Simple plainchant version in many hymnbooks, or choir version by Davies
CommunionAve verum – Elgar  

Panis angelicus – Franck    
Ubi Caritas by Ola Gjeilo
Simple anthem, can be simplified further if needs be
For two voices
ThanksgivingLocus iste – Bruckner
Psalm 150 – Stanford
Unaccomp satb
SATB + organ – easy, impressive
HarvestNow the green blade * see above

Thou visitest the earth – Greene

Fairest Lord jesus lovely 3 part easy arrangement by Martin How
Or free 4 part hymn

Harvest Hymn by Mary McDonald
 
RemembranceKontakionMoving, 4-part harmony
FuneralPsalm 121 – I will lift mine eyes- Walford DaviesBeautiful, simple setting, performance options flexible
WeddingJesu, Joy of man’s desiring – Bach 
GeneralThe Battle of Jericho arr. David Dickau
Be Thou My Vision by Philip Stopford
God be in my head by Robert Hobby
I Heard the Voice of Jesus Say by Laurence Caldecote
In the Beginning by Daniel Bondaczuk
Non nobis Domine by Patrick Doyle

All the PDFs below are free from copyright restrictions. Either they are out of copyright or composers have given permission for them to be used freely.