For the discs that you don't know what they are....newer discs are starting to 'mark' them. If they are Discraft, you will find the disc name inside the rim. Other discs may have the name "tooled" on the underneath - it could be raised or "etched". Sometimes it will be written in marker and may be an abbreviation of the name.
So, first see if there is anything written on the bottom - if so, post it here and we can help identify it, you can also run your finger over the inside of the rim and see if you feel raised lettering - if so, that should be the disc name, if still nothing....then hold the disc upside down, turn it and tilt it to see if there is a name (and sometimes weight) etched or raised on the bottom of the flight plate.
Harder to do, but you can also get an idea by measuring the rim width, depth, and flight plate thickness.