Add PicoShare to File Transfer section (#2935)

README.md

@@ -910,6 +910,7 @@ _Related: [Groupware](#groupware)_
 - [lufi](https://framagit.org/fiat-tux/hat-softwares/lufi) - Let's Upload that FIle, client-side encrypted. ([Demo](https://demo.lufi.io), [Source Code](https://framagit.org/fiat-tux/hat-softwares/lufi/tree/master)) `AGPL-3.0` `Perl`
 - [lutim](https://github.com/ldidry/lutim) - Let's Upload That Image. `AGPL-3.0` `Perl`
 - [OnionShare](https://github.com/micahflee/onionshare) - Securely and anonymously share a file of any size. `GPL-2.0` `Python`
+- [PicoShare](https://pico.rocks) - A minimalist, easy-to-host service for sharing images and other files. ([Demo](https://demo.pico.rocks), [Source Code](https://github.com/mtlynch/picoshare)) `AGPL-3.0` `Go`
 - [PictShare](https://www.pictshare.net/) - PictShare is a multi lingual, open source image hosting service with a simple resizing and upload API. ([Source Code](https://github.com/HaschekSolutions/pictshare)) `Apache-2.0` `PHP`
 - [Plik](https://github.com/root-gg/plik) - Plik is a scalable and friendly temporary file upload system. ([Demo](https://plik.root.gg/)) `MIT` `Go`
 - [Pomf](https://github.com/Pomf/Pomf) - Simple file uploading and sharing, source for the now shut down site Pomf.se. `MIT` `PHP`