Are basically the two staple point, entry level products that any micro/smalls player should be investing in right off the bat. I've written about both, more recently GTO+, but these two tools used in conjunction together really change the way you visualize and play intuitively at the tables.

Flopzilla/HoldEQ definitely has it's place in the market, but I would say that Power-Equilab is the definitive equity calculator out there.