Accounting

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/
https://www.mechcad.net/downloads/

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

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