Microsoft BizSpark is partnering with one of the startups in its program, 9Slides, to make its online presentation technology available for free use by the other 45,000 startups in the program.

The arrangement, announced this morning, promises to give a boost to 9Slides, a Redmond-based startup whose technology synchronizes the video of a speaker’s presentation with the slides from the same talk for viewing afterward online. 9Slides CEO Ruchit Garg says he expects the partnership to increase the company’s exposure and help it land further business and partnerships.

Startups in the BizSpark program, which get access to Microsoft technologies at no cost, are being offered a 12-month gold subscription to 9Slides, which normally costs $99.99/year. (9Slides also offers a free tier of service supported by advertising.)

The interactive slides are based on HTML5 and can be viewed on PCs, Mac, iPad and other devices.

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