Does anyone know of liberated-and-gratis contact management or sales-force 
automation packages out there for Linux?  (Ideally they would use Postgresql 
or MySQL for record management.)

Before getting laid off (as a volunteer) from my last real job, I was a junior 
sales geek  (<-- long sad story).  I developed a schema in Access to help 
manage my telephone and other contacts.

Now I want to develop a similar schema and keep it in Postgres.  However, 
before going to the trouble, I though it prudent to see if this wheel is 
already invented.

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PS.

If not invented, what features do you think the database schema should be 
designed to support?