This index has commentaries and studies on 2 Kings.

• James Van Dine – Analysis of Kings 26 pgs offsite
• Constable – 2 Kings (b) (61 pages) 
• Henry, Matthew – Commentary (b) Set: Josh.-Est. Vol.2  12.6MB (1701 pgs).
• Jamieson-Fausset-Brown – Commentary on the whole Bible (b)  48.8MB (3949 pages) page 646
• Keil & Delitzsch – Commentary on 2 Kings (b) 1.3 MB (370 pages).
• Gray, James – Concise Bible Commentary on Old Testament (b)#2 Kings
• Maclaren – Commentary Dt, Jos, Judg, Rut, 1-2 Sam, 1-2 Kings 1-7 (b) 1.6MB (441 pages) 
• Maclaren – Commentary 2Kings8-Chr, Ezra, Neh, Esth, Job, Prov, Eccl (b) 1.5MB (427 pages) 
• McGee – 1 & 2 Kings 317k (32 pages).