Some are on the simplistic side, so they'll likely not replace anything you might already have in place, but if you're starting out as a small business Zoho is probably a good jumping-off point. They're just the tip of the iceberg, however – Zoho Workplace includes a powerful site creation tool, a file management solution and many collaborative tools. Zoho's new-look word processor (which ditches the classic Word-style interface in favour of a formatting sidebar) is very well-presented and capable of producing professional-looking docs, and it has a sterling spreadsheet and reasonable presentation package alongside it.
It's certainly closer to a desktop office package, and it's strong enough to have attracted businesses like the BBC and Nike as regular users. While Google Docs is, thanks to the strength of its brand, probably more widely used, Zoho Workplace is very good in its own right.