Which Plugin does WPMU use for Custom (to find developers or to find a project)?

Greetings!

I am looking for the right plugin for my website similiar to what WPMU has one (Custom) to find developers or to find a project.

My website will be more about homeowners and contractors.

For homeowners:

To request a service (by category) to do the house project like installing a programmable thermostats. Ask for "quote" from contractors,

For contractors:

To browse projects (by category) and bid the project.

Also I want contractors to provide business address, phone, email and business phone number.

Your help is greatly appreciated and definitely will save my time to hunt down for the right plugin!

Brad