I’ve mentioned previously about baking-in quality and not having developers throw code over a wall to testers.
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Everyone on the team is concerned with not only assuring quality in what we deliver, but making it visible to ourselves and the business.

We work in an agile manner, iterating through development with extreme programming practices and Behaviour Driven Development. Facilitating our relationship with the business is Scrum and we utilise kanban principles and systems thinking to maintain a speedy throughput of high-quality work. This mixture allows us to communicate effectively, develop the correct features properly and continuously deploy our work when it is complete, thus maximising business value. I should also mention that we are fortunate enough to have our business people/customer sat across from us.
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Without testers or a QA team there is no wall over which work can be thrown and the responsibility for quality absolved.
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The inspection typically carried out end-of-cycle only yields bugs that were low severity and of no real impact to the end user.
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An agile testing must-have, we use TeamCity to continuously run our unit tests on each check-in. We also execute our Cucumber acceptance tests on scheduled runs. The status of the builds are visible on dedicated monitors around the office as well as a nice 6′ projected screen.