Lotus 1-2-3 (1983) 55 Spreadsheet Windows

Lotus 1-2-3 was an early spreadsheet application available for MS-DOS. It became extremely popular in the late 1980s, displacing the former leader VisiCalc. Lotus had difficulties adapting 1-2-3 to the Windows environment, and was overtaken by Microsoft Excel. Spreadsheet functionality was also included in Lotus Symphony. Later versions were included in Lotus SmartSuite.

• 9.0 (Win)

Lotus Notes (1993) 2 Communications PIM Windows

Lotus Notes is a powerful e-mail and collaboration tool. It was heavily used by large corporations. It was sometimes criticized for its complexity and bloat. Notes is a client server tool, and uses the Lotus Domino server (originally just called Lotus Notes server). Lotus Notes and Lotus Domino competed against Microsoft Outlook and Microsoft Exchange.

• 3.x