You could have downloaded Sketchpacks 0.6 for Mac from our software library for free. The actual developer of this free Mac application is Sketchpacks. The software is included in System Tools.
From the developer:
Browse, manage, and auto-update your Sketch plugins from the menu bar.
Main features:
- Keep your plugins up to date with the latest release served by the Sketchpacks Registry.
- Don’t let unexpected compatibility issues break your workflow. Lock plugins at specific versions.
You may want to check out more Mac applications, such as PDFGarden, AppMenuBoy or Folder Lister, which might be related to Sketchpacks.