Madan Mohan is the only composer whose compositions were used after two decades of his death. It was in the 2004 film Veer Zara his compositions were used. Once an assistant to S D Burman, he made few tunes for him but those were not used.
S. D. Burman used a tune very late in 1956. This was the song 'Mera Sundar Sapna Beet Gaya' (Do Bhai)originally composed by Madan Mohan. It is also believed that the song 'Jeevan Ke Safar Mein Rahi' (Munimji) was a Madan Mohan composition as he was an assistant for Munimji.
He was so creative that he composed different tunes for antras in the same song very often. Recall the song 'Tum jo mil gaye ho' and 'Betaab dil ki tamanna' (Hanste Zakhm) or Ek haseem shaam ko'l' (Dulhan Ek Raat Ki) and almost all songs from Heer Ranjha... 'Do Dil Toote', 'Tere kolache Mein', 'Milo na tum to' and 'Yeh Duniya Yeh Mehfil'.

In the film "Chandan", the song "Ye Khule Khule Se Gesoo, Ye Udee Udee Si Rangat... Log Kahe Mere Nain Baaware", has all the three stanzas composed in different tunes. There are three heroines in this film viz. Nutan, Shyama, and Mala Sinha. Possibly, each stanza is picturized on a different actress.

Madan Mohan & Lata Mangeshkar

Madan Mohan & Rafi

The first film of Madan Mohan

Madan Mohan had a habit of making many tunes well in advance, one of such tune of the hit song, Yeh Duniya Yeh Mehfil was composed by Madanji in the 50s, but found a place in a film only when it was recorded for Chetan Anand's HEER RANJHA (released in 1970). another tune of "Naina Barse" was made in 1952.It was used in Woh Kaun Thi
Madan Mohan was also a good singer. He had a fascination for K L Saigal. He gave playback for a few films in his films. Aankhen 1950 was his first film as an independent composer, he sang a duet with Shamshad Begum " Humse Na Dil Ko Lagana".

There is an official site of Madan Mohan Ji https://www.madanmohan.in/ in this site 2 categories of unreleased songs are mentioned. We can visit this site and listen to these rare songs.

In this blog, I am posting a few such songs.