Every Quickstart package apart from K2 contains other free extensions that are already installed and bundled in the package.

All of our packages contain the following free extensions:

1. Admin Tools by AkeebaBackup
2. Akeeba Backup by AkeebaBackup
3. AllVideos by JoomlaWorks
4. Cache Cleaner by NoNumber

Depending on the template extensions like TinyLetter Subscribe may be included. Make sure to check each template's documentation to check if any additional extensions are included.
Click here to read about commercial extensions.