Workday, is all set to go public today, at a valuation of $4.5 billion. It has raised $637 million, by selling close to 22.8 million shares for $28 each.

Oracle has acquired yet another enterprise cloud startup, SelectMinds, a provider of cloud-based employee recruitment and HR services.

Workday, a cloud based enterprise software company which competes with Oracle, SAP, Salesforce.com and others, has filed for an IPO. It plans to raise $400 million.

IBM has acquired Kenexa, a social human resources, talent acquisition and management software company, for $1.3 billion.