Lotus Improv (1991) 8 Spreadsheet Windows

Improv is a spreadsheet program that attempted to re-imagine how one would create and interact with spreadsheets. It was first released in 1991 for NeXT computers, and for a time became one of the NeXT's "Killer Apps". In 1993 Lotus released Improv 2.0 for Microsoft Windows. It was not marketed as a direct replacement to Lotus 1-2-3, and 1-2-3 remained dominant until both were overtaken by Microsoft Excel.

• 2.x

PFS Professional Plan (1987) 1 Spreadsheet DOS

PFS: Professional Plan is a spreadsheet program that offered more features than Lotus 1-2-3. It can read and write Lotus 1-2-3 1.x and 2.0 files, has advanced formula and macro capabilities, a large choice of built in report writing options, and built in Presentation Graphics. Earlier version went by the name PFS:Plan

• 1.x

ProCalc 3D (1992) 0 Spreadsheet DOS

ProCalc 3d is a low-cost spreadsheet created by Formalsoft and sold by Parsons Technology.

• 1.x

Quattro Pro (1987) 31 Spreadsheet DOS Windows

Quattro Pro, initially just named "Quattro", is a spreadsheet application from Borland International. It competed against Lotus 1-2-3 and Excel, and had several advantages including tabbed sheets, and the ability to handle up to a million rows. Quattro Pro was the subject a lawsuit by Lotus, simply because because Quattro Pro copied their menu user interface, but Lotus claimed this was not allowed. This also affected The Twin and VP-Planner.

• 1.0
• Pro 1.x
• 2.x
• 3.x
• SE 1.0
• 1.0 (Win)
• 4.x (DOS)
• 5.x
• 6.x (Win)
• 5.6 (DOS)