A couple of years ago Bojan Bostjancic and Peter Kuhar started building Instant Heart Rate, an iPhone app that measures the heart rate of a user through the smartphone camera. Users would hold their finger over the camera for 10 seconds and the app would be able to detect and measure their heart rate. This app has hit 8 million downloads in 9 months between iPhone and Android.

Quid is a quantitive analysis startup company that has raised $10 million in Series C funding from Atomico Ventures, SV Angel (Ron Conway’s investor fund), Founders Fund, Endeavour Vision, Infocomm Investments, and Charles Lho. PayPal co-founder Max Levchin joined Quid’s board of directors.

MindJolt is a gaming company that is run by MySpace co-founder Chris DeWolfe. DeWolfe left MySpace a few years after News Corporation acquired the social network company.

Topsy is a real-time search engine that has raised $15 million in a third round of funding. Topsy allows users to search for real-time content on Facebook and Twitter. Topsy recently launched Topsy Social Modules, which lets publishers add real-time content to their websites. Social Modules are being used by websites such as Discovery Communications and The Huffington Post. Western Technology Investments, BlueRun Ventures, Ignition Partners, Founders Fund, and Scott Banister invested in this round. This puts Topsy at a total of $30 million in funding. [VentureBeat]

Yammer, the micro-blogging service for enterprises, has raised $25 million in funding. The funding was led by U.S. Venture Partners. Emergence Capital, Charles River Ventures, and the Founders Fund had participated in this round. Yammer’s total funding is at $40 million. U.S. Ventures’ Mamoon Hamid will join the Yammer board of directors.

Topguest is a mobile check-in loyalty service that was founded five months ago. The service has raised $2 million in Series A funding and has added Peter Thiel as an advisor. The investors in this round of funding include Founders Fund, Ron Conway, Keith Rabois, Jeff Clavier, and Naval Ravikant. Topguest is also exiting beta today.

Causes is an online philanthropy service that was started by Joe Green and Sean Parker. Causes recently raised $9 million in Series C funding from Founders Fund, Marc Benioff, Dustin Moskovitz, Karl Jacob, Keith Rabois, and Ron Conway. Scott Sandell will also be joining as an observer on the Causes board of directors. Green said that the company plans to use the funding for building their team.

Popular URL shortening and analytics service Bit.ly has raised $8.9 million in Series B financing. This round of funding was led by AOL Ventures and RRE Ventures. Existing investors include Betaworks, O’Reilly Alpha Tech Ventures, Founders Fund, and SV Angel. Every day about 200 million Bit.ly short links are clicked on through Twitter and other services. Even though Bit.ly is no longer the default URL shortening service for Twitter, the traffic continues to grow for the service.