I'm trying to write a program that will compute digits of transcendental numbers using a spigot algorithm. While researching, I found the BBP Formula, and a Compendium of BBP-Type Formulas, alas, I can't seem to find formulas for numerous other constants (eg. $e$, $\gamma$, etc.).
I'm particularly interested in finding BBP-Type formulas because this would allow me to implement a single algorithm that could deal with many constants uniformly.
If that's not the case, is there a reference of spigot algorithms for transcendental constants around? (I haven't found any myself).