Contact Management

Tools for managing your customer, client and partner relationships. 

Collaboration

• These tools help you get the work done, whether you have a virtual team or work with vendors.
  
  • Basecamp by 37Signals
    Provides tools for collaborating, including to-do lists, messages, file sharing, milestones, writeboards and live chat.
    

CRM: Contact Relationship Management
Manage that database of contacts easily and inexpensively so you don't forget to follow up.

• BatchBook
  Offers a different kind of dashboard than Highrise, is less expensive for more contacts, and integrates with 3rd party apps for things like email.
  
• Big Contacts
  The low-cost version is a simple way to track contacts, but the premium version provides deeper integration with other business functions. Starts at $9/mo. Also integrates with email tool Vertical Response.
  
• Highrise by 37Signals
  Keep track of clients, contacts, conversations and tasks. Different than other CRM tools, this one lets you "tag" with keywords to find anything easily.
• Pipeline Deals

Project Management

• Pivotal Tracker
  Free project management tool based on software agile development, but with many other uses.

Appointment Setting

• Genbook
  Online appointment setting for small businesses.
  
• Tungle
  Scheduling app that syncs with your existing calendars. Has social tools too.

Memberships

• Wild Apricot
  Want to start your very own club? This hosted solution helps you manage sign ups, member services and events. If you're a non-profit or help manage non-profits, this site could do the trick. They even allow you up to 50 members for free.