WinPlus was a cross-platform clone of the Hypercard

HyperCard

HyperCard is an application program created by Bill Atkinson for Apple Computer, Inc. that was among the first successful hypermedia systems before the World Wide Web. It combines database capabilities with a graphical, flexible, user-modifiable interface. HyperCard also features HyperTalk, written...

 application that enables users to run HyperCard stacks on Apple Macintosh, Microsoft Windows

Microsoft Windows

Microsoft Windows is a series of operating systems produced by Microsoft.Microsoft introduced an operating environment named Windows on November 20, 1985 as an add-on to MS-DOS in response to the growing interest in graphical user interfaces . Microsoft Windows came to dominate the world's personal...

 and OS/2

OS/2

OS/2 is a computer operating system, initially created by Microsoft and IBM, then later developed by IBM exclusively. The name stands for "Operating System/2," because it was introduced as part of the same generation change release as IBM's "Personal System/2 " line of second-generation personal...

 (Presentation Manager).

Originally the application was developed by Format Software GmbH (Cologne, Germany) to overcome deficits of Hypercard

HyperCard

HyperCard is an application program created by Bill Atkinson for Apple Computer, Inc. that was among the first successful hypermedia systems before the World Wide Web. It combines database capabilities with a graphical, flexible, user-modifiable interface. HyperCard also features HyperTalk, written...

, like lack of color support, fixed card size etc.. With the wider acceptance of other graphic user interfaces like "Presentation Manager" (OS/2) and Windows the development was extended to cover the cross-platform aspect. The software was initially distributed as "PLUS" in 1989.

Later it was distributed by Spinnaker Software

Spinnaker Software

Spinnaker Software was a 1982 founded software company known primarily for its line of non-curriculum based educational software, which was a major seller during the 1980s. It was founded by chairman Bill Bowman and president C. David Seuss....

 and marketed as "Spinnaker PLUS" and "WinPlus". Based on the same source code Oracle

Oracle Corporation

Oracle Corporation is an American multinational computer technology corporation that specializes in developing and marketing hardware systems and enterprise software products – particularly database management systems...

 developed OracleCard, also known as Oracle Media Objects

Oracle Media Objects

Oracle Media Objects, formerly Oracle Card, was a multi-media software development tool for developing multi-media applications, with similar functionality and appearance to Apple Computer' HyperCard....

. Spinnaker later sold the application to ObjectPlus Corp., marketing it as "ObjectPlus".