I have been working on a commentary on the Psalms. I have decided to compile some of my favorite links that I discovered during my research. There is a mix of exegetical and sermonic links. Here is what I have for Psalm 9 (in no particular order). Feel free to mention any that you find helpful in the comments section.
Spokane Bible Church: http://www.spokanebiblechurch.com/books/psalm-9
Literary Analysis of Psalm 9: http://psalmsstudy.com/psalms-literary-analysis-by-chapter/literary-analysis-psalm-9-gds-sanctified-defeated-wicked-uprise-righteous
Analysis by C. J. Labuschagne: https://www.labuschagne.nl/ps009-10.pdf
William Barrick’s notes: https://drbarrick.org/files/studynotes/Psalms/Ps_009.pdf