a superb link to a '91 newsgroup post. I dont think I've ever come across a classication of ghazals acc to raags. yo this one!

things I humbly noted:

Chupke chupke raat din aanso bahana yaad hai- this all-well-known by Ghulam Ali is bhairavi. hoho, this one almost goes everywhere on notes.
Ranjish hi sahi, dil hi dukhaney ke liye aa- one of the few ghazals i've heard of Mehdi Hassan. This is Yaman doode. the primary basic raag. wow!
Ranj ki jab guftagoo honey lagi - Ghulam Ali in Bhoop Kalyan. nope, dont know this one.
Hangama hai kyon barpa"- Ghulam Ali - Darbari. typical halla in darbaar. hoho.
Kal chaudvin ki raat thee, shab bhar raha ... Ghulam Ali - Khamaj. sophisticated shringaar.
Yeh dil yeh paagal dil mera, kyon ... aawargee Ghulam Ali - Bhairavi is back! same halchal, aawaragi as chupke chupke
Mehfil mein baar baar kisi par nazar gayi - Ghulam Ali - Megh . I've heard only the Soldier version of this one. hoho.

we need a bigger annotated collection for ghazals. sb do it pls!!
Here's a huge list for movie songs.