Sunnyvale, Calif. - InvenSense, a developer of motion sensing units for mobile consumer applications, said on Monday that it has raised $19 million in its third round of funding, led by new investor Sierra Ventures.

Mountain View, Calif. - Ooyala, a developer of online video and advertising delivery technology that was founded by a group of former Google employees, said this week that it has raised $8.5 million in its second round of venture capital, from Sierra Ventures and private investors.

Amsterdam - Spotzer Media Group, a provider of video advertising services, has raised $14.8 million in a new financing round led by Sierra Ventures.

Redwood City, Calif. - NebuAd, a developer of behavioral advertising technology, said on Tuesday that it has closed on a second round of venture capital financing, led by Sierra Ventures and Menlo Ventures, bringing its total funds raised to date to $30 million.

Sunnyvale, Calif. - Expresso Fitness, a supplier of interactive cardio fitness systems, announced that it has raised $9.3 million in its third round of funding, which the company plans to use to expand its sales and production capabilities.

San Francisco - Piczo, an online social network with 10 million mainly younger teen users, announced on Thursday that it has raised $11 million in its third round of venture capital financing.