From the developer: "DKCALCv2.0 is a 32-bit speech & sound enabled editable tape calculator that offers both adding machine as well as standard windows calculator functionality. It comes with the basic scientific functions, common financial functions, colored backgrounds for easy reading, paper tape features such as printing, print preview, storing to a file, retrieving a file and the advanced features of adding notes/comments to entries. It offers tape error handling and automatic re-calculation of numerical corrections of a tape even if the tape had been previously stored to a file.It supports common windows editing functions (copy,paste etc.), can be set to the top most window position, provides 4 memory locations, optional sound effects for selected operations and optional voice output for numerical entries, functions and results. It supports mouse free operation with keyboard shortcuts for most functions and comes with a comprehensive Help utility complete with content links and a searchable index."

Note: 10-use trial. Registration is $10.60.