I have been working on a commentary on the Psalms. I have decided to compile some helpful links that I discovered during my research. It includes a mix of exegetical and sermonic links. Here is what I have for Psalm 39 (in no particular order). Feel free to mention any that you find helpful in the comments section.
The Fathers on Psalm 39: https://pursuingveritas.com/2019/08/20/the-fathers-on-psalm-39
Literary analysis of Psalm 39: http://psalmsstudy.com/psalms-literary-analysis-by-chapter/literary-analysis-psalm-39-master-hope
Analysis by C. J. Labuschagne: https://www.labuschagne.nl/ps039.pdf
William Barrick’s notes: https://drbarrick.org/files/studynotes/Psalms/Ps_039.pdf