Google I/O will be starting tomorrow and 5500 developers will come together at the highly anticipated developer conference held by Google. Google’s I/O event will also grab more eyeballs after the recent introduction of iOS6 and Microsoft’s Slate tablet and next generation of Windows Phone O.S.

Earlier today at the keynote of BUILD conference, Steven Sinofsky, President, Windows & Windows Live Division at Microsoft announced that developers will be able to download the Windows Developer Preview via the new Windows Dev Center.

Apple releases session videos which were taken during its annual developer conference, World Wide Developer Conference(WWDC) 2011. About 110 videos are available in both HD and SD formats for the Mac, iPad, iPod touch, iPhone or Apple TV.

Google I/O 2011 is just a few days away and it will host a large number of developers who will be keen to spend two days learning more about Google’s technologies including Android, Google Chrome, Google APIs, Google Web Toolkit and App Engine among others.

Looking to go to Google I/O? Win free tickets to go to Google I/O 2011 by participating in contests by Google.

Microsoft will be holding their annual developer conference PDC 2010 on October 28th and 29th. If you are an enthusiast or developer but could not make it to the event, you can attend it at a local Microsoft center or watch it online too.