Most developers are at least passingly familiar with the notion of code review - that having source code read over by another developer, or a group, is a good way to catch things that the original author missed. While code review started out as a physical meeting process, there's been increasing interest in supporting distributed code reviews via the web. A recent tool release from Google, Rietveld, brought this back into the news - but there are other tools that are probably a better fit for most organizations.