Will you please provide me the list of some good Companies providing summer training for B.Tech ECE 3rd year students???

Yes sure, here I am proving you the list of some good Companies providing summer training for B.Tech ECE 3rd year students:

AMD,
Bharat Electronics Limited (BEL),
Bharat Electronics Limited,
CISCO,
Civil Aviation Department;
Electronics Corporation of India Limited (ECIL),
HP
Indian Oil Corporation Ltd. (HPCL / BPCL / IPCL),
Indian Railways,
Indus tan Aeronautics Limited (ISRO),
Intel, Samsung Electronics,
Indian Engineering Service (IES),
LG Electronics, Nokia,
Nvdia,
Oil and Natural Gas Corporation Limited (ONGC),
Philips Semiconductors,
Power Sector (NTPC / NHPC Ltd.),
Semiconductor, Chip Design-Industries (Motorola , IBM, HP, STM, Philips, IT etc),
Software Industries (ALL MNC’S) (HAL),
Sony,
Steel Authority of Indian Limited (SAIL),
Texas Instruments,
Toshiba,
Indian Telephone Industries, BSNL/ MTNL