Use different color for extensions and custom blocks · Issue #1336 · scratchfoundation/scratch-blocks · GitHub

Replace scratchblocks with s3blocks · Issue #2726

Hacked Blocks - Support Argument Hacking · Issue #1030

Allow custom blocks to be shaped like C blocks (if, repeat

GitHub - KittenBot/scratch3-extension: The scratch3 extension

Scratch blocks as objects by Fastfur07 on DeviantArt

Implement Define blocks · Issue #1102 · scratchfoundation

How to Create Custom Blocks (Functions) in MIT Scratch

Block appearance in forums should resemble Scratch 3.0 block

Adjust colors for control and events · Issue #1489

Make the color of the block a comment is attached to more

Ability to change custom block color/section - Discuss Scratch

Scratch Coding Camp - Animal Antics Badge - STEM Detective Lab

Custom Extension Creator - Discuss Scratch

Replace scratchblocks with s3blocks · Issue #2726