Office Applications

'A great office suite that costs nothing'

Learn more: Learn Open Office.org & Tutorials for Open Office.org

Some great extensions: Modern Impress Templates

Professional Templates & Writer's Tools & PDF Import

Active Image Lotus Symphony put together by IBM is also free, yes free for business use!
Microsoft Office

Office live Microsoft Office has gone online.

Microsoft Office is the best known world and used throughout business,both large and small and educational institutions.

The ongoing costs are there for all upgrades and given most people only do basic word processing or spread sheets there are a number of user friendly & free alternatives.

docx-converter For converting Microsoft's new .Docx format
Google Docs

Google docs is free and available to all who have a Google/Gmail account

Sync Open Office docs with Google Docs

Star Office Free and available to all.They have a paid/supported version also. Based on Open Office.
Active Image
thinkfree is a free online office suite.

go-oo.org
Free Open Source Office program 'Better Faster Freer'

cl1p
The internet clipboard. Copy and Past between computers

Phrase Express
Clipboard Utility

Fight the Bull

Find and eliminate jargon in your documents.

WinMerge is useful for finding changes between project versions, and then merging changes between versions.
Open and edit your files from everywhere!

Open IT Online is the best way to open and edit your documents from everywhere!

Its free and a great extention for Firefox .

pCloud Business
pCloud Business