Company pays $3.6 million for portal maker Intranet software maker Open Text has acquired enterprise portals developer Corechange, whose technology Open Text plans to integrate with its own Livelink product, the companies said Wednesday.Open Text paid $3.6 million in cash for Corechange, according to a regulatory filing, with additional cash payments possible based on Corechange’s revenue during the next year.Corechange, in Boston, is the developer of Coreport, a software product that can be used for internal and external portal systems integrating corporate documents, applications and services. Waterloo, Ontario-based Open Text intends to mesh Coreport with its Livelink collaboration and knowledge management software, which includes document storage, discussion, search, scheduling and workflow management features. Open Text has recently purchased several other companies to integrate their technology with Livelink. It agreed in January to pay up to $6.7 million for sales software maker Eloquent, and in November spent $20.3 million to buy unified communications software developer Centrinity. Software DevelopmentTechnology Industry