Government Organizations of Tamilnadu.
- IRCTC : Indian Rilway online ticket booking system by IRCTC : irctc tatkal tickets, cancellation, booked history and print e-ticket.
- Indira Gandhi Centre for Atomic Research, Kalpakkam : Indira Gandhi Centre for Atomic Research [IGCAR], the second largest establishment of the Department of Atomic Energy.
- Tamilnadu Postal Circle : Official website details of the Tamilnadu Postal Circle.
- Central Excise Madurai : Central Excise Madurai website has service tax info, help desk, notifications, trade notices, forms, tariff, holidays, customs, directory etc.
- Chennai Metro Rail Limited : Chennai Metro Rail Limited website : project profile, why metro rail, alignment map, schematic map, line map, project status, tenders, careers, contact info
- Sports Development Authority of Tamil Nadu : Sports Development Authority of Tamil Nadu is the is the official sports organ of the Government of Tamil Nadu promoting sports in the state.