Greasy Fork is available in English.
Adds a direct download button to all the tracks on SoundCloud (works with the new SoundCloud interface)
< Feedback on SoundCloud Downloader
You're right, the script is currently broken. Updating is still on my to do list, but isn't really a priority since I'm not using it anymore myself. Feel free to submit a pull request in case you find a fix.
Creates a button which does nothing. Doesn't bypass proxy sites as toneden hypeddit and others. Not sure what is the usecase for it