Here is a long list of all the programs broadcast by DD National in Alphabetical Order:
A

• Aarohan
• Aahuti
• A Tryst with the People of India
• Aa Bail Mujhe Maar
• Aakhiri Dao
• Aamne Saamne
• Aap Beeti
• Abhimaan
• Ados Pados
• Afsane
• Agni
• Air Hostess
• Ajnabi
• Albeli
• Alpha Plus
• Amir Khusro
• Amravati Ki Kahaniyan
• Anandi Gopal
• Anjali
• Ank Ajube
• Antaraal
• Aparajita
• Apna Apna Aasman
• Appu Aur Pappu
• Aryamaan
• Asish
• Aurat

B

• Baaton Baaton Mein
• Baazigar
• Babaji Ka Bioscope
• Bahadur Shah Zafar
• Baigan Raja
• Bante Bigadte
• Barrister Vinod
• Bhootnath
• Bikhri Aas Nikhri Preet
• Boolbul Bagh
• Brahmaand

C

• Chakravyuha
• Chamatkar
• Chandramukhi
• Chapte Chapte
• Charitraheen
• Chauraha
• Chayageet
• Chekhov Ki Duniya
• Chhoti Badi Baatein
• Chhutti Chhutti
• Chulo Aasmaan
• Chunni
• Cricket with Mohinder Amarnath

D

• Dard
• Darpan
• Dayasagar
• Dekho Magar Pyar Se
• Deviji
• Dharti Naache Amber Gaaye
• Dil Dariya
• Duniya Gazab Ki
• Dushman

E

• Ek Do Teen Char
• Ek Ghar Aas Paas
• Ek Se Badhkar Ek
• Ek Tha Rusty
• Ekai Dahai Saikda
• Ekas Ke Hum Barik

F

• Farmaan
• Farz
• Faster Fene
• Fatichar
• Fhir Wahi Talaash

G

• Ganadevta
• Gaurav
• Ghar
• Ghutan
• Gopichand Jasoos
• Guchhae
• Guniram
  

H

• Haddi Raja

• Hakke Bakke
• Hamari Bahu Tulsi
• Happy Home
• Hari Mirchi Lal Mirchi
• Heera Panna
• Hello Zindagi
• Himalay Darshan
• Himalaya Ki Goud Mein
• How's That!
• Hum Hindustani
• Hum Pancchi Ek Daal Ke
• Humrahi
  

I

• Idhar Udhar
• Imtihaan
• Inkaar
• Insaaf
• Intajaar
• Intezaar Aur Sahi
• Isi Bahaane
• Itihaas

J

• Jai Ganga Maiya
• Jai Hanumaan [1998]
• Janbaaz
• Jantar Mantar
• Jhingur Pehalwan
• Jo Kahunga Sach Kahunga
• Jo Jeeta Wohi Sikander
• Jugalbandhi
• Junoon

K

• Kaaun
• Kab Kyun Aur Kahan
• Kab Tak Pukaroon
• Kabhi Yeh Kabhi Woh
• Kacchi Dhoop
• Kadva Sach
• Kahani Dharti Ki
• Kakaji Kahin
• Kala Paani
• Kanoon
• Karamati
• Karan the Detective
• Karma - Mayavi Nagari
• Karwa Sach
• Kasamm
• Kashish
• Kabhi Sautan Kabhi Saheli
• Katha Sagar
• Katha Sarita
• Kayar
• Kehar
• Khali Haath
• Khandaan
• Khel Khel Mein
• Kile Ka Rahasya
• Kirdaar
• Kissa Shanti Ka
• Krishi Darshan
• Kshitij Yeh Nahin
• Kuch Khona Hai Kuch Paana Hai
• Kuch Khoya Kuch Paya
• Kudrat
• Kunti
• Kya Banoge Munna
• Kyun Apne Huye Paraye

L

• Lahun Ke Phool
• Lekhu
• Lohit Kinare
• Lok Lok Ki Baatein
• London Ki Ek Raat

M

• Mahanagar
• Main Dilli Hoon
• Maan
• Main Tulsi Tere Aangan Ki
• Mamaji
• Manoranjan
• Manzil Apni Apni
• Mashaal
• Mashahoor Mahal
• MatheMagic
• Meethi Meethi Batein
• Mere Humdum Mere Ghost
• Meri Awaaz Suno
• Mirza Ghalib
• Mitti Ke Rang
• Morning Transmission
• Mr. Ya Mrs.
• Mr. Yogi
• Mrignayani
• Mrityunjay
• Mujrim Haazir
• Mulla Naseeruddin
• Mungeri Ke Bhai Naurangi

N

• Nai Drishti Nai Raah
• Nathkat Narad
• National Programme of Dance

• National Programme of Music
• Naya Nukkad
• Neem Ka Ped
• Neev
• Nehle Pe Dehla
• Nirmala
• Nupur

O

• Om Namah Shivay [1996]

P

• Pachpan Khambe Lal Deewarein
• Palash Ke Phool
• Panch Tantra Ki Kathayen
• Panchhi
• Pankhon Se Panjon Tak
• Parakh
• Param Vir Chakra
• Paying Guest
• PC 1008
• PC Aur Mausi
• Phir Wahi Talaash
• Phool Khile Hain Gulshan Gulshan
• Phulwanti
• Police File Se
• Potli Baba Ki
• Prahari
• Prashan Manch
• Professor Vasan
• Pumpkin Patch
• Puraskar
• Purab Aur Paschim

Q

• Quiz Time

R

• Raag Darbari
• Raaz...Ki Ek Baatt
• Raja Aur Rancho
• Raja Ka Baja
• Rajni
• Raju Aur Udaantashtari
• Rangarang

S

• Saanjha Chulha
• Sab Ka Maalik Ek Hai
• Safarnama
• Sahasraphan
• Samundar
• Sangharsh
• Sansaar
• Sansmaran
• Saptahiki
• Sauda
• School Days
• Sea Hawks
• Shri Krishna
• Shrikant
• Sohni Mahiwal
• Space City Sigma
• Stree... Teri Kahani
• Subah
• Subah Savere
• Sukanya
• Suno Re Kissa
• Super Six
• Surabhi
• Swaraj

T

• Taana Baana
• Talaash
• Tandoori Nights
• Tarang
• Tehreer...Munshi Premchand Ki
• Tenali Raman
• Terah Panne
• The Great Maratha
• That's Cricket
• Thoda Sa Aasman
• Trishna
• Turning Point
• Twelve Months

U

• Udaan
• Ulta Pulta
• Upanyaas
• Upasana

V

• Vilayti Baaboo
• Virasat
• Vishwa Darshan
• Vishwamitra

W

• Wagle Ki Duniya
• Wah Janaab
• Waqt
• Waqt Ki Raftar
• Wild Adventures: Ballooning with Bedi Brothers
• Woh Hue Naa Hamaare

Y

• Yatra
• Yeh Duniyan Gazab Ki
• Yug
• Yugantar

Z

• Zamana Badal Gaya
• Zameen Aasmaan
• Zigma

Off- Network Programs (Some dubbed into Hindi)

• Bioscope
• Echoes from the Jungle
• Focus
• Here Comes Lucy
• Ignited Mind II
• Life Line
• Nadia
• Rimba's Island
• Show Time
• Spiderman
• The Jungle Book (Jungle Book Shōnen Mowgli, dubbed into Hindi)
• The Mickey & Donald Show
• The Reporter

Courtesy of Wikipedia
The above list could be incomplete, you can help in expanding it by commenting on the Doordarshan National Blog's Page on Facebook.