No matter how smart a worker you are, there are plenty of open source tools that can make you more productive. They range from hugely useful Firefox extensions such as iMacros (which lets you record repetitive, multi-step tasks and then execute them with one click) to collaboration applications for efficient co-working. Here, you'll find five of our best posts and collections on productivity enhancement tools. Everything found here is free.

What's not to like about Google Apps? It has a ton of features, it's incredibly easy to collaborate with other people, and it's free. Well, how about the fact that your data is only as accessible as Google decides to make it? If you're looking for the usefulness of a Web-based collection of office apps but want complete control over your data, OpenGoo might be just the answer you're looking for.