Windows Apps for Business Applications
Example,

GoToMeeting
Free to try

Wunderlist
Free

Slack
Free

Dropbox
Free

One Calendar for Windows 10
Free

Zoho Books - Accounting on the go for Windows 10
Free

Microsoft OneNote
Free

Trello for Windows 8
Free

Microsoft Teams for Windows 10
Free

Invoice 360 for Windows 10
Free

Microsoft Office Visio Professional 2007
Free to try

Microsoft OneNote
Free to try

Business Card Designer Plus
Free to try

Microsoft Office XP Update
Free

Office XP Service Pack 3 (SP3)
Free
Fax Wizard 2000
Free to try

Microsoft Office 2003 Update: Service Pack 2
Free

Microsoft Visio Premium 2010
Free to try

Fax Machine
Free to try

BusinessCards MX
Free to try
OfficePrinter
Free to try

OpenOffice.org Portable
Free

Microsoft Visio Premium 2010 (64-bit)
Free to try
Easy PDF Converter
Free to try