What it is: Web4 Foundation is simply the name given to the open-source side of Web4 GROUP's work — not a separate company or legal entity from LINKSPREED.
What it covers: Public repositories such as Web4 Lite and the UIID Cookbook, published so the ownership architecture behind Web4 can be independently inspected, forked, and self-hosted rather than taken on faith.
Where to find it: The projects are published on GitHub (github.com/Web4-Organisation).
How it fits the bigger picture: Web4 GROUP, under LINKSPREED, holds the operation and specification of Web4 as well as this open-source foundation — so "Web4 Foundation" describes a body of open work, not a separate organizational branch alongside LSP GROUP or DEV.UNITY.