The Doxology is actually only the last verse ("Praise God from whom all blessings flow..."), an additional prayer of praise added to the end of Psalm 100. Here are some other well-known doxologies:

Glory be to the Father, and to the Son, and to the Holy Spirit
As it was in the beginning, is now and ever shall be
World without end. Amen.

Through him, with him, and in him,
In the unity of the Holy Spirit
All glory and honor is yours, almighty Father
Forever and ever. Amen.

For thine is the kingdom and the power and the glory
Forever and ever. Amen.
(doxology appended to the Lord's Prayer)

It seems to me that doxologies are often Trinitarian endings to prayers that may not have originally been Trinitarian, but maybe that's just my own experience and not a general rule.
-Joe Offer-