This is the best part, when useful features in an addon make it to the official Blender. Forever for everyone to use.
It's always best to use the latest, but in the rare case you're using an older version of Blender, here are the past releases.
Even better: you can join the Blender Cloud, enjoy all the tutorials and movie assets, and at the same time support Open Projects that make Blender better! Win-win isn't? . Additionally, you can also join the Development fund, an initiative that pays developers to work on making Blender stable by fixing bugs and implementing crucial features.