Most good thinking tools were invented by someone, and most problems have been worked before by people who left a method behind. This inventory gathers those methods in one place and files each one under the step of SOLVE eX where it does its work: describing a situation, writing a goal, learning the facts, generating options, choosing among them, or carrying the choice out.
Every tool names the people who devised it, with the work and the year, and links to that work where a stable public page exists. The tools written for SOLVE eX sit on the same shelves as everyone else's, credited first to the methods they adapt or combine.
Find the step you are on, then filter by the kind of tool (a matrix, a checklist, a canvas, a question bank), how many people it takes, and how long it runs. Where the problem is organizational politics, the Tactics of Organizational Politics go further.