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 26 (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-26
Literary analysis of Psalm 26: http://psalmsstudy.com/psalms-literary-analysis-by-chapter/literary-analysis-psalm-26-walk-sincerity-redeem-gracious
Analysis by C. J. Labuschagne: https://www.labuschagne.nl/ps026.pdf
William Barrick’s notes: https://drbarrick.org/files/studynotes/Psalms/Ps_026.pdf
Examine me, Lord — A Study of Psalm 26: https://www.christiancourier.com/articles/1444-examine-me-lord-a-study-of-psalm-26
Eric Mathis, A Commentary on Psalm 26:1-8: https://www.workingpreacher.org/preaching.aspx?commentary_id=1021