What are some of the best business collaboration software or web tools out there?

I did a fast Google (remember when it was Alta Vista, oh have the times changed) and came up with this:

http://www.readwriteweb.com/start/2010/01/top-10-online-collaboration-to.php

The question is a) what is your definition of collaboration and b) what do you want to do or achieve?

The "business collaboration" category is a broad one. We like SharePoint because it can be used to create internal as well as external (extranet) collaboration sites. SharePoint gives you a lot of capabilities such as workflow management, version control and search. But if all you need is simple document sharing, sites like dropbox.com or huddle.com may be all you need.

I think www.mangospring.com has extensive features internally and externally.

I agree that the "collaboration" software space is a broad one.

In my opinion most SaaS applications are collaborative given the browser based access that enables team members from across the world and your company to have secure access to the same single source of truth and to work collaboratively within each application or platform.

I am the CFO of the SaaS leader in Corporate Performance Management software (budgeting, financials consolidations, financial reporting, metrics management) - Host Analytics.

At Host Analytics we only use SaaS software and here are some of the the SaaS applications we have had great success with (and what they do in the parenthetical): Host Analytics (see parenthetical above), the Google apps/gmail platform (mail, calendaring, internal portals), Salesforce (CRM), Financial force.com (professional services project tracking and productivity management), Parature (support ticketing system), WebEx (conference calls, web meetings), Boomi (data integration), Avalara (sales tax add-in to ERP), Paychex (payroll), Expensewire (T&E automation), Accompa (product enhancement tracking), Success factors (HRM), Marketo (Marketing automation), Samanage (fixes asset tracking) and for ERP there are several great SaaS options incuding Intacct, Netsuite and SAP Business By Design.

Hope this helps. Kelly

I love gotomeeting.

For doc sharing, we use MS Skydrive. For video meetings we recently moved to gotomeeting from webex. For phone services, we use skype.