http://www.salesforce.com/au/?ir=1
http://www.jcurvesolutions.com/
http://www.netsuite.com.au/portal/au/home.shtml
OR the haed way ....
1) Zimbra (MS-Exchange replacement); proprietary email shouldn't go thru google or yahoo mail servers.
2a) OpenVPN - whatever location you are at is bugged. Assume this.
2b) TrueCrypt - every laptop has this and all our data is stored in TC volumes, including PST files for those who insist on Outlook still.
3) vTiger - FOSS CRM application
4) Alfresco - FOSS document management done really well
5) MediaWiki - for quick communications and idea capture. We try to capture meeting notes, and other internal process docs in this tool. It is easy to change the content when something needs to be updated.
6) dotProject - project management/tracking and issue tracking. If you are late, that customer won't be back.
7) Tons of FOSS infrastructure - Ubuntu, Xen, openldap, postfix, clamav, openoffice, pidgin, apache, rdiff-backup, samba, cups ... the list goes on and on.
8) Skype - 123Conference isn't bad either
9) dd-wrt/open-wrt/tomato - turn your $20 router into a $600 router with VLAN support.
10) VirtualBox - laptop virtualization; not for production use IMHO.
11) Microsoft tools because you can't get completely away from some of them. MS-Office, MS-Visio, MS-Server 2003/2008 (for our customers).
12) Assorted other apps: pdf995, Quicken H&B, Quickbooks, Indesign, etc.
We looked at 37folders/basecamp and were very impressed, but our security needs don't allow for external hosting except at the VM level. We are paranoid because we know what can happen. Our customers are paranoid too.
http://www.dotproject.net/
for comments for business use.
http://getsatisfaction.com/