Brother Jonathan is a small cross-platform ERP/MRP package coded in PHP+AJAX, allowing small manufacturers to manage custom jobs. Includes modules for parts, assemblies, quotes, purchase orders, invoices, and fax/email capability for some reports.
"Deskcopy" is one of the reports used while gathering bids
"Quotes" is the most complex module
Accounting shows open/closed invoices and purchases
History shows an overview of recent items, with links
Inventory can be received against a Purchase Order
Purchase Orders are derived from Quotes and Contracts data