UPDATED 6/13/13: Added Timo So's MoreOptions Extension. On 5/31/13: Added NaochanOn's Barcode Extension.
The impossible goal is that this list will eventually contain every quality extension made for Small Basic.
I'm starting with some listed in the Small Basic Forums, but you should also come back later, because this list will evolve over time.
Barcode Extension - by NaochanOn
Data Extension (v1.0.3) - by Oskariok
ESL Extension (v.10a) - by Liam McSherry
Excel Library for Small Basic - by JSakamoto
Fast 2D Graphics Extension - by FuleSnabel
Fremy's Extension (v1) - by FremyCompany
I/O Extension (v1) - by Noah Buscher and gungan37
IE Library for Small Basic - by JSakamoto
Joystick/Game Controller Extension (v1, prereq, how to) - by gungan37
LitDev Demonstration C# Extension Set - by LitDev
Math Extension (v.01) - by Zock77
MoreOptions Extension (v0.2) - by Timo Sö
Moving Extension (v1) - by Math Man
PlusPlus Extension (v2) - by gungan37
Power Array Extension (v1) - by EzyMCP
PowerExtension (VB.net) - by Noah Buscher
SayPlus! VB.net Extension (v1.3.2) - by AshkoreDracson
Teaching Extensions (v .034) - by LynnLangit & TeachingKidsProgramming
Windows Forms for Small Basic (v 2.0) - by gungan37
You can upload your extensions either at the MSDN Gallery or at CodePlex. In MSDN Gallery, you earn Recognition Points and Achievement Medals in the same system as the Small Basic Forums and as TechNet Wiki, where you can create how-to and troubleshooting articles about Small Basic scenarios.
Leave a comment with more extensions to add. We'll need a name and a link to download it. Find the community version of this gallery over on TechNet Wiki.
- Tall Basic Ed