But I didn't have music to post for any of those. Here's an mp3 of a version that the St. David's Compline Choir uses, though; it's much better to learn to sing by ear anyway, I think.
O Gracious Light Phos hilaron
O gracious light,
pure brightness of the everliving Father in heaven,
O Jesus Christ, holy and blessed!
Now as we come to the setting of the sun,
and our eyes behold the vesper light,
we sing your praises, O God: Father, Son, and Holy Spirit.
You are worthy at all times to be praised by happy voices,
O Son of God, O Giver of Life,
and to be glorified through all the worlds.
Here's the Wikipedia entry for the Phos Hilaron. Here's Evening Prayer, Rite II, from BCPOnline.