ACT! (1987) 3 PIM DOS

ACT!, or "Activity Control Technology", originally from Conductor Software, and later Contact Software and then Symantec, is an easy to use business relationship management system targeted at traveling sales professionals. It can track things like billable time and expenses.

• 1.10 (DOS)

Stacker (1991) 7 Utility Archive DOS Windows

Stacker, from Stack Electronics, was a hard drive compression tool. It was wildly popular until Microsoft virtually eliminated the third party market for this by including their own drive compression tool with MS-DOS 6. and Expandz! Plus.

• 1.0 (DOS)
• 2.0 (DOS)
• 3.x (DOS)
• 4.0 (DOS)