Based on our record, Google Design Sprint Kit seems to be more popular. It has been mentiond 1 time since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
Also Google (as in the company not the verb) has a free version of their discovery techniques here https://designsprintkit.withgoogle.com/. Source: about 1 year ago
Design Sprint Kits - A pre-assembled kit for GV design sprints.
Design Principles - An open source repository of design principles and methods
UX Research Field Guide - Your map to the world of UX research 🌏🕵️♀️
Sprint - How to solve big problems and test new ideas in 5 days
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Land Book - The homeland for fine websites