miniserve is a small, self-contained cross-platform CLI tool that allows you to just grab the binary and serve some file(s) via HTTP. Sometimes this is just a more practical and quick way than doing things properly.
XBackBone is a simple, self-hosted, lightweight PHP backend for the instant sharing tool ShareX. It supports uploading and displaying images, GIF, video, code, formatted text, and file downloading and uploading. Also have a web UI with multi user management and past uploads history.
The log file navigator, lnav, is an enhanced log file viewer that takes advantage of any semantic information that can be gleaned from the files being viewed, such as timestamps and log levels.
It is a simple, fast and small file manager with single php file. It is also a web code editor. It'll run either online or locally, on Linux, Windows or Mac based platforms.