TLDR Options - Guesstimate the possible value of startup options
Founderfit by Koble - See how you compare to VC-backed founders.
Unicorn Nest Dataset - Free dataset of VCs investing in seed and series A+ rounds
China Company Check - Check and verify the Chinese company
Ennerate - Automated business valuations for 'Main Street' companies
MicroAcquire - A free & anonymous startup acquisition marketplace