Free or low cost Business Software

Below is the list, I hope you find it useful

CRM / Project management
http://basecamphq.com/
http://www.zoho.com/
http://www.salesforce.com/au/

Books online with free shipping
http://www.bookdepository.com/

Time tracking, invoice and accounts
http://previewstreamtime.com/au/streamtime/
http://www.sohnar.com.au/index.php
http://basecamphq.com/
http://www.getharvest.com/
http://billingsapp.com/
http://invoicemachine.com
http://www.invoiceonline.com.au.

DIY Web sites
http://www.businesscatalyst.com/ - I build customised website with this system for my clients, very good CMS.
http://www.squarespace.com/
http://www.homestead.com/ 

http://www.bigcommerce.com/
http://www.sitemasher.com

E-commerce website software
Netregistry - StoreXpress

http://www.magicdust.com.au
Commonwealth Bank iShop
eCorner Cloud Shops
gate13
http://www.ashop.com.au/
Shopify - USA Based
Volusion - USA based
BigCommerce - USA based

Office
http://www.google.com/apps/
http://download.openoffice.org/

Send large files / file sharing / data backup
https://www.yousendit.com/
http://www.4shared.com/
http://www.filesanywhere.com/
https://www.dropbox.com/
http://www.box.net/pricing


Newsletter distribution
http://www.mailchimp.com/

Accounting
http://www.freshbooks.com/
http://www.saasu.com/
http://gnucash.org/
http://www.xero.com/

Anti virus
http://www.avast.com/en-au/index
http://www.superantispyware.com/


Solo resources
http://thewealthyfreelancer.com/
http://www.flyingsolo.com.au/

Coffee Mornings
http://www.thelatteguy.com/

Outsourcing
http://www.elance.com
http://www.crowdspring.com/