I just got the batch of ATtiny85s I ordered for some pals at a local Maker group. I have articles here on ATtiny84, but not on this chip. So here are some quick notes on getting started with the ATtiny85.
The first thing you need to program the chip is an AVR programmer. I am using a Pocket AVR Programmer from Sparkfun. But you can buy much cheaper programmers. Look for USBtiny programmers – in India you can get one of these for about Rs. 350 from ebay.in.