On this page you can find specific Debian Packages able to replace Windows programs.
For additional info search http://www.debian.org/distrib/packages for the names of the windows equivalents and have a look at the following websites:
Office Applications:
Complete suites:
Components:
Word: OpenOffice.org-writer libreoffice-writer abiword kword
Excel: openoffice.org-calc libreoffice-calc gnumeric kspread kchart
Power Point: openoffice.org-impress libreoffice-impress kpresenter prosper
Access: you can include any SQL database (e.g. mysql) into OpenOffice or LibreOffice using their ODBC interface
Money: gnucash
http://www.adobe.com/products/acrobat/readstep2.html (if you don't want the English version, select another language).
Web Applications:
Multimedia Applications:
If you can't find any equivalent package which suits your needs consider RunningWindowsPrograms.