IDG Ventures
Investment focus: information technology companies, preferring either seed or first-round financings, or very late (last before IPO) stage investments
http://www.idgventures.com
Menlo Ventures
Investment focus: early-stage and emerging growth companies in the areas of biotechnology, medical devices, healthcare services, computer software, hardware, networking, communications, and the Internet.
http://www.menloventures.com
TVM Techno Venture Management
Investment focus: European and U.S. communications technology, information technology and biotechnology
http://www.tvmvc.com/