Baseball America has a list of all the Astros' minor-league free agents for our perusal.
Here are the 20 from Eddie's Farm:
RHP Roy Corcoran, RHP Shane Loux, RHP Jonah Bayliss, LHP Andy Van Hekken, C Edwin Bellorin, 1B Chris Shelton, 2B Matt Kata, SS Edwin Maysonet
RHP Erick Abreu, RHP Evan Englebrook, RHP Jeremy Johnson, RHP Jailen Peguero, LHP Polin Trinidad, C Lou Santangelo, 3B Jhon Florentino, SS Marcos Cabral, OF David Cook
LHP Edwin Walker
C Buck Afenir
LHP Dieudone Paul