Social software startups providing products to businesses have been catching the eye of venture capitalists for some time. Thirty-eight of 55 companies identified by Jeremiah Owyang, a partner at the research firm Altimeter Group, received funding.

Champions Oncology of Hackensack, N.J., earlier this week announced it had raised $9.3 million at a price of $0.50 per share in a private placement to existing and new investors. That group includes Battery Ventures IX, L.P., PAR Investment Partners, L.P., members of the company’s management team, and early-stage investor Harris & Harris Group, which invested $200,000 in the financing. No commissions were paid in connection with the private placement.

Early-stage investor Sunil Dhaliwal, formerly a general partner at Battery Ventures, ha launched venture capital fund that is focused exclusively on infrastructure technologies. His new Cambridge, Mass.-based firm, Amplify Partners, did not disclose how much money it has to invest but says it raised investment capital from a “blue-chip list of IT infrastructure executives, financial industry veterans and forward-thinking institutional investors” and that is initial investments will range in size from $50,000 to $1.5 million.

ERP testing and upgrade automation SaaS provider Panaya has secured $16 million in Series D funding. Funding came from the company’s existing investors, led by Battery Ventures. Also participating in the round were Benchmark Capital and Hasso Plattner Ventures.

Brightree, a provider of billing and business management software solutions for the home medical equipment market, has acquired home health and hospice software provider CareAnyware of Raleigh, N.C. Brightree is backed by Battery Ventures.

Wayfair.com said it raised $36.3 million in equity financing from Battery Ventures, Great Hill Partners, HarbourVest Partners and Spark Capital. The money will be used to grow Joss & Main, the company’s private sale site for the home. The site has nearly three million members and is operating at a $100 million annual revenue run-rate.

Plivo has closed a $1.75 million seed round of financing from Andreessen Horowitz, Battery Ventures, Qualcomm Incorporated and SV Angel. Launched in December 2011, Plivo is a voice and messaging applications platform provider.

GreenBytes, a developer of cloud-scale IO-offload solutions has appointed chairman Steve O’Donnell as chief executive officer. Earlier this year, GreenBytes received $12 million in Series B funding led by London-based Generation Investment Management with participation from Battery Ventures and GreenBytes management.

Email technology provider PowerInbox has merged with ActivePath, a provider of interactive email technology within the enterprise space. PowerInbox is based in Cambridge, Ma, and ActivePath is based in New York, with offices in Tel Aviv, Israel. The combined entity will have $10 million in funding from Atlas Venture, Longworth Venture Partners, Battery Ventures, Genesis Partners, GIMV NV and Correlation Ventures.

Continuuity has secured a $10 million Series A funding round. Battery Ventures and Ignition Partners led the round, and were joined by returning and new investors Andreessen Horowitz, Data Collective and Amplify Partners.