distribute it on your own risk, it is part of the Google Android code. License is whatever license they use (macOSX only has x64 binaries).
all files are zip-compressed (compatible ZipCrypto with Deflate, and 4byte aligned ..for good measure).
(linux/osx users needs to make files executable (chmod) and windows should right-click/properties and click unblock.

+---linux
|       aapt.zip
|       aapt2.zip
|       aapt2_64.zip
|       aapt_64.zip
|
+---macosx
|       aapt2_64.zip
|       aapt_64.zip
|
\---windows
        aapt.exe.zip
        aapt2.exe.zip
        aapt2_64.exe.zip
        aapt_64.exe.zip

see readme_aapt.nfo and readme_aapt2.nfo for some helpful command-line usage.
if it was useful to use you may buy me a coffee ☕︎ (thanks!).