Staying away from piracy, these are all done through Android emulators and the associated ROMs. Assuming you own the game that you have a ROM for or are considered "abandonware", all should be well. But I'm no lawyer, so take this for what it's worth.
PSX4Droid is the best PS One emulator I've found for Droid. It is no longer on the Market, but is now a free download, be sure you get "v2". This works great for WC3 and 4 even on a stock Droid 1.
Snes4Droid is another great emulator that is no longer on the Market, but can surely still be found in ".apk" download format. However you get the SNES emulator, this is the way to play WC1.
GameBoid is the GBA emulator used for WC Prophecy. Obviously any emulator will do, but GameBoid worked best for me.
ADosBox works best for Armada and Privateer as it doesn't send you straight to the joystick calibration (which naturally you don't have). Controls with the "arrows" is though, but I'm trying to get the hang of mouse controls in Privateer. If you don't have a physical qwerty keyboard, this will add a whole new difficulty... and in my opinion, you should be throat-chopped for not foreseeing the need for a physical keyboard.
Hope this helps, please feel free to ask about any emulator settings issues... or anything in general.
The ebooks are all what I found, and I own the original copies. In other words, I will not be sending them to folks in the interest of not becoming a cyber piracy criminal. That being said, ezPDF Reader is best for reading the ones in PDF format, and "Cool Reader" is great for epub format.