‘Hamd’ is a poem or song in praise of Allah. Hamd is usually written in Arabic, Persian, Punjabi, English or Urdu. Sung hamd can be found in qawwali performances. Hamd comes from the Qu'ran which Muslims believe is Allah's word. It is equivalent to the word "Praise" in English language. "All things praise you (Allah)" (Quran).
Hamd is sung all over the Muslim world from Indonesia to Morocco. However, in the past few years, Pakistan has been the hub for Hamds.
'Hamd' is not the exclusive domain of any religion. As pointed out - it denotes praise to a deity, it is more extensively used in the Muslim world. It is usually used in conjunction with the Sanna and referred to as 'Hamd - o - Sanna'.

Naat is a poetry that specifically praises Prophet Muhammad (PBUH). Many of the famous scholars in the earlier days of Islam wrote Naat. People who recite Naat are known as Naat-Khuwan or Sana-Khuwan.
Commonly the term Naat-Shareef (Exalted Poetry) is reserved and used for the poetry in the praise of Muhammad (PBUH) written in Urdu, Persian, and Arabic.
In the Arabic language, Naat is usually referred as Madih (praise), or simply as Nasheed (poetry) or Anasheed (plural). The latter two terms can describe any type of religious poetry.

Qawwali is the traditional form of Islamic song found in India and Pakistan. The word qawwali is derived from the Arabic word Qaol which means “axiom” or “dictum”. A qawwal is one who sings qawwali, or the dictums of the prophets and praises of God. The qawwali is closely linked to the spiritual and artistic life of northern India and Pakistan. The qawwali is inextricably linked to the sufi tradition; Sufism is a mystical school of Islamic thought which strives to attain truth and divine love by direct personal experience. In Arabic, this mysticism is known as ‘tasawwuf’. The difference between Sufism and mainstream islam is simple. All Muslims believe that man is on a path to God (tariqah). However where the mainstream Muslim believes that it is only possible to reach God during ones life. To this end there are a number of different techniques and methods.

Sufi poetry has been written in many languages, both for private devotional reading and as lyrics for music played during worship, or zikr. Themes and styles established in Arabic poetry and mostly Persian poetry have had an enormous influence on Sufi poetry throughout the Islamic world.
The poetic tradition within Islam is still alive today, has given us an amazing bounty of sacred and mystical poetry from the Sufi and Muslim traditions. Sufi poetry has been sung all over the world and Sufi music is also renowned worldwide. Some of the famous Sufi poets are:
Farid ud-Din Attar, Hazrat Nizamuddin Aulia, Sultan Bahu, Bulleh Shah, Baba Sheikh Farid, Ahmad Jami, Imadeddin Nasimi, Shah Hussain, Gharib Nawaz, Shaikh Saadi….etc.