EXHIBIT 2.1 AGREEMENT AND PLAN OF REORGANIZATION BY AND AMONG TIBCO SOFTWARE INC., CARDINAL ACQUISITION CORPORATION, EXTENSIBILITY, INC. AND THE PRINCIPAL STOCKHOLDERS OF EXTENSIBILITY, INC. Dated as of August 2, 2000 TABLE OF CONTENTSAgreement and Plan of Reorganization • September 19th, 2000 • Tibco Software Inc • Services-computer integrated systems design • Delaware
