Other sources of extensions

MIT official website

• MIT App Inventor Extensions
• Google Groups - App Inventor Open Source Development

Communities

• Thunkable community *Recommended source for searching extensions
• Makeroid community
• Appybuilder community
• Block2Code community

Other categories

• Thunkable extensions directory
• Taifun - pura vida apps
• NMD
• ...

All other links welcomed, please just contact me. Thanks to everyone that contribute to platforms like App Invnentor!