AppleWin is a good choice for Windows systems and it's open source! Get the latest version here: https://github.com/AppleWin/AppleWin/
Just extract the zip file and it's ready to go.
For Linux you can run LinApple, a port of AppleWin.
There's also EPPLE II which runs on Windows, Mac, and Linux, and is also open source. It's a little harder to get set up and running. You'll probably need DskToWoz2 to convert disk images to the Woz format that EPPLE II uses.
RetroPie comes with an Apple II emulator.
LinApple has also been optimized for the Pi, check out linapple-pie.
For these emulators, you'll need the disk images for Logo, those can be found at Apple2Online.