Accounting

AceMoney Lite

AceMoney Lite Version (Single User) is just the thing for your small business or personal finances. AceMoney works well under Linux with Wine.
https://www.mechcad.net/acemoney-lite/
Download:
https://www.mechcad.net/downloads/

GnuCash

Personal and small-business financial-accounting software, freely licensed under the GNU GPL - Windows, Mac OS X and Linux.
https://gnucash.org/

PLCash

PLCash is a platform-independent personal finance program. Runs on Windows, Mac OS X and Linux. NB: PLCash needs Java to run.
https://arachnoid.com/PLCash/index.html
Windows:
https://arachnoid.com/PLCash/PLCash.exe
Jar file for Mac OS X and Linux:
https://arachnoid.com/PLCash/PLCash.jar

TurboCASH

TurboCASH's single/multi user accounting software
https://www.turbocash.net/
Download free version 4...
https://www.sourceforge.net/projects/turbocash