God
If you mean the 'twin' Psalms, then they are Psalm 111 and 112, which many believe were written by the same author and should be one.
The Authors of Psalm 84 are the Sons of Korah
Psalm 100 is one of the many psalms that has an anonymous author.
Yes and no. Yes, no name is given. And no, because tradition states that this Psalm (and certain others) was originally spoken by Moses (Rashi commentary, on Psalm 90:1, referring also to Psalm 100).
Any psalm can become responsorial, so there is not one specific psalm that is clearly identified and whose use can be discussed.
One Psalm is attributed to Ethan, Psalm 89.
It isn't known what event, if any, it was written for.
There are a wide range of bible websites that offer the option to find Psalm 142. One can access the full version of this Psalm on sites such as Bible Study Tools. One can also view the individual portions of the Psalm on the Bible Hub website.
Psalm 139 is a psalm of praise to God, but also a psalm of hatred. In the final verses (19-24) the author imagines that God would slay the 'wicked', then says that he hates with perfect hatred those who hate God.
Psalm 110 is written by King David.AnswerIn line with tradition, the King James Bible attributes Psalm 110 to King David. However, this psalm contains an acrostic in Hebrew of the name of Simon Maccabaeus, proving that it could not possibly have been written before the second century BCE.
Matthew Debnam has written: 'The psalm-singer's guide'
Psalm 9 is a lament Psalm.