The San Francisco-based startup Chartboost has raised a $19 million Series B round of funding led by Sequoia Capital, which was joined by existing investors TransLink Capital and SK Telecom Ventures. Chartboost allows game developers to reach new users through cross-promotion, make money from their games, and collaborate directly with fellow developers. The company had previously raised $2 million in funding, a round that closed in October 2011.

Chartboost has raised $2 million in a first round of funding from TransLink Capital, SK Telecom Ventures and XG Venture. The company has created a direct-deal advertising marketplace for game publishers. Chartboost is based in San Francisco.

Redwood City, Calif.-based Kabam, a publisher of massively multiplayer social games, has closed on a whopping $85 million in Series D financing. Google Ventures and Pinnacle Ventures co-led the round, which included participation from Performance Equity and SK telecom ventures, as well as previous financial investors Canaan Partners, Redpoint Ventures and Intel Capital. Google Ventures Partner Joe Kraus will join Kabam’s board as a result of the round. This latest infusion brings the company’s total funding to $125 million.

San Mateo, Calif.-based uCirrus, which develops enterprise operating software, has raised $4 million in a round led by Menlo Park, Calif.-based SK Telecom Ventures. Qualcomm Ventures and ATA Ventures also invested in the round. SK Telecom Ventures’ Rob Trice, ATA’s Mike Hodges and Qualcomm’s Jack Young will join uCirrrus’ board of directors as a result of the funding.