For those wondering the difference with scratch, it's on the about page:

> About Snap!

> Snap! (formerly BYOB) is a visual, drag-and-drop programming language. It is an extended reimplementation of Scratch (a project of the Lifelong Kindergarten Group at the MIT Media Lab) that allows you to Build Your Own Blocks. It also features first class[1] lists, first class procedures, and first class continuations[2]. These added capabilities make it suitable for a serious introduction to computer science for high school or college students.

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biofox 7 hours ago | parent [-]

Scratch already allows you to create custom Blocks and features lists. This seems like a perfect example of reinventing the wheel (and fragmenting development communities).

	▲	striking 7 hours ago \| parent \| next [-]
		Snap implemented these features and others long before Scratch had. To my memory it might have been a decade earlier.
	▲	DonHopkins 6 hours ago \| parent \| prev [-]
		Actually there is a large historical overlap between the two communities -- warm, collaborative, always giving credit where due. Different goals, lots of feedback both ways. Jens Mönig was on the Scratch Team (invited by Mitch Resnick). BYOB was presented at Scratch@MIT 2010 explicitly to merge ideas back into Scratch, not to fork the community: https://scratched.gse.harvard.edu/resources/announcing-byob2... Berkeley has kept showing up at Scratch conferences (Amsterdam 2015, Bordeaux 2017), and the Scratch forums hosted BYOB/Snap! discussion for years: https://scratch.mit.edu/discuss/topic/4455/ So "NIH syndrome," "reinventing the wheel," and "fragmenting the community" is pretty much the opposite of how these two actually interact. Documented cross-pollination: BYOB => Scratch: custom blocks (Scratch 2.0 took command blocks only, not reporters/lambda). That was an explicit goal: https://en.scratch-wiki.info/wiki/Snap! Scratch => Snap!: browser rewrite timing influenced by Scratch 2.0 plans; Morphic via John Maloney; CC-licensed costumes/sounds used under license. Shared people: Jens (Scratch Team => Snap! lead), John Maloney (Scratch/Morphic; GP session with Jens at Scratch2015AMS), Bernat Romagosa (Snap!, MicroBlocks, Snap4Arduino -- Bordeaux, Snap!Cons).