The guns and the bombs, the rockets and the warships, are all symbols of human failure.

Lyndon B Johnson

Accounting

AceMoney Lite Version (Single User) is just the thing for your small business or personal finances.
AceMoney works well under Linux with Wine
http://www.mechcad.net/products/acemoney/index_lite.html
http://www.mechcad.net/downloads/AceMoneyLiteSetup.exe

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.
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
NB: PLCash needs at least v1.4 of Sun's Java runtime to run.
http://www.java.com/en/download/installed.jsp