Update README.md

README.md

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 # Sonic Screwdriver
-Simple music server, written in Python.
+Simple music server, written in [Python](https://python.org).
 ## Features
 - Sonic Screwdriver has been thoroughly tested to work with thousands of songs well...ish.
+- Works well on Linux, Windows and MacOS.
 - Hosts a minimal Web UI for admin purposes and for checking the music index is correct.
 - Easily hackable. You can change almost anything about this program.
+## Caveats
+- Does **not** work with the [*Raspberry Pi*](https://www.raspberrypi.com/) because of upstream issues with [pillow](https://pypi.org/project/Pillow/).
+## Clients
+### [paperback](https://github.com/yuckdevchan/paperback)
+Paperback is a simple [Sonic Screwdriver](https://github.com/yuckdevchan/sonic-screwdriver) client that's made by me. It is not feature-packed but it does one thing and one thing alright.https://www.raspberrypi.com/
 ## Licensing
-Remember, Sonic Screwdriver is **Free Software**. You may modify, distribute and use Sonic Screwdriver for commercial purposes but you must retain the **LICENSE** included with the program. See **LICENSE** for more details.
+Remember, Sonic Screwdriver is **Free Software**. You may modify, distribute and use Sonic Screwdriver for commercial purposes but you must retain the [**LICENSE**](https://spdx.org/licenses/MIT.html) included with the program. See [**LICENSE**](https://spdx.org/licenses/MIT.html) for more details.