"for PHP beginners and people with little to no programming experience. If you used PHP in the past and forgot most of it this book might also serve you well." (ib. 2018-03-21)
"an easy-to-read, quick reference for PHP popular coding standards, links to authoritative tutorials around the Web and what the contributors consider to be best practices" (ib. 2018-03-21)
"client only bidirectional file synchronizer", used by ownCloud/Nextcloud
"Toast UI Editor", GFM Standard + Chart & UML Extensible.
"Proprietary peer-to-peer file synchronization tool available for Windows, Mac, Linux, Android, iOS, (...). It can sync files between devices on a local network, or between remote devices over the Internet via a modified version of the BitTorrent protocol." (Wikipedia, 2018-01-21)