Quick Bid - Quick Bid can be used by estimators to produce profitable bids with material & labor costs with integrated tools to help manage estimates & projects.
PartsBox - The complete solution for building electronics.
Corecon - Corecon offers integrated estimating, project management, and job costing for small to medium-sized construction companies.
BOMIST - Parts Inventory and BOM Management for Electronics
SmartBid - Construction bid management for general contractors
PartKeepr - PartKeepr is an open source inventory management system that you can alter according to the particular requirements of your business or of the area from where you are operating.