Arena PartsList is a BOM manager that’s integrated with the Octopart component database. It has neat functions like auto-fill, that automatically adds a part to your database directly from a sales page of a electronics component distributor like Farnell, Digi-Key, Mouser, etc… [via]
Octopart just tweeted a free tool for BOM management. You can import a CSV file into a project and auto fill details using Octopart.
Their main tool is a more comprehensive product with collaboration features and stuff. They charge $79 per user per month, which includes training, tech support, upgrades, etc.
Arena PartsList free BOM management tool - [Link]