First of all I want to say TIDEL Park is an information technology (IT) park situated in the city of Chennai not in Madurai.

Partial list of companies:
OneGlobe Systems LLP
OrangeScape Technologies Limited
Pointel Solutions India Pvt Ltd
Tata Consultancy Services
Ericsson
Sify Technologies Ltd
Anantara Solutions Pvt Ltd
Trimble Information Technologies Pvt Ltd
Cisco Systems
Williams Lea
Centre for Development of Advanced Computing (CDAC) R&D
State Bank of India
Canara Bank
India Post
National Informatics Centre
Urjanet Energy Solution
Data telesis
Softsquare Solutions
Payoda Technologies

TIDEL Park profile :
Type Information Technology Park
Location Taramani, Chennai, India
Address 4, Rajiv Gandhi Salai, Taramani, Chennai, Tamil Nadu 600 113, India
Construction started 1999
Completed 2000
Inaugurated 4 July 2000
Cost 338 crore
Owner TIDEL Park Ltd
Height
Roof 51.68 m (169.6 ft)
Top floor 12
Technical details
Floor count 13
Floor area 1,280,000 sq ft (119,000 m2)
Lifts/elevators 19
Design and construction
Architect C N Raghavendran (CRN Architects)
Developer TIDCO and ELCOT
Main contractor Hyundai Engineering Company