Boundary scan developer and testing tools

OpenOCD is an open source JTAG debugger, it supports a good range of adapters both open source and proprietary.

It's worth looking into. But, I have only used it for simple boards with single microcontrollers.

I work for GOEPEL in the UK, we offer a free trial as well. We normally accompany this with a board setup, so you can get a better feel for what the tools can do. Whereabouts are you based, I can get our local office to get in touch or just register on our website. No real open source alternatives, what you are paying for is automated test generation. The low cost end of the market can normally get you in toggling pins, programming files etc, but if you are looking at production test you need safe quality tests that are going to find your build defects. Depending on your test coverage, you need to consider if Boundary scan alone will cover this or does it need other test strategies or functional test. Be careful on how test coverage is reported, if you start hearing 90-100% quoted then dig deeper into the figures. If it is not too late, check out our design guidelines.