Blossom vs waffle.io: What are the differences?
Developers describe Blossom as "Lean Product Management. For people who love the products they create". A very lightweight agile/lean project management tool. On the other hand, waffle.io is detailed as "Simple project management for your GitHub issues, free for open source". Track priority and rank for your GitHub issues across multiple repositories. Automatically see issues moved across a board for you, when you open pull requests or create branches.
Blossom can be classified as a tool in the "Agile Project Management" category, while waffle.io is grouped under "Kanban for GitHub Issues".