ashttpd was originally a testbed for a kernel async-sendfile patch. Today, it's just another Web server for serving static content rapidly. It differs from its competitors by storing its webroot in a database, which provides a 50% performance increase over using the operating system's VFS. It also allows precalculation of strong cache-validators (ETags).
Higgs.IO is a high performance, message oriented network library built for realtime systems. It provides a core extensible framework and libraries built on top of the core. Libraries include a WebSocket server, an HTTP server and client, and Boson, a custom serialization and RMI library.
NXWEB is ultra-fast and super-lightweight web server for applications written in C. It can serve thousands of concurrent requests with a small memory footprint using an event-driven and multi-threaded model that is designed to scale. It features an exceptionally light code base, a simple API, decent HTTP protocol handling, keep-alive connections, SSL support (via GNUTLS), HTTP proxy (with keep-alive connection pooling), non-blocking sendfile support (with configurable small file memory cache), cacheable gzip content encoding, cacheable image thumbnails with watermarks (via ImageMagick), a modular design for developers, and the ability to run as a daemon.
Alaya is a primitive chrooting Web server with basic WebDAV support. It can serve HTTPS and HTTP, and can authenticate using PAM, /etc/shadow, /etc/passwd, or using its own authentication files that allow for 'native' users that only have access to alaya content. It's intended to be a simple method of sharing content over WebDAV, and though it can be configured with a config file, it's easy to configure by command-line switches alone. Alaya always chroots to ensure that malicious users can't use '..' within a URL to access unintended documents, and that users can't accidentally leave documents in places outside of the chroot. It has a 'ChHome' mode that chroots users into their home directory and serves content from there. It supports .cgi scripts out of a trusted path (so not from within the chrooted WebDAV share) and read-only shared directories that are outside of the chroot (allowing access to shared content when in ChHome mode).
Kangee is a personal on-demand fileserver that makes it possible to send files to your friends. Dragging a file into the Kangee window will generate a link, which can be sent to your friend, who may open it in a Web browser and download the file. It also supports an "Add Upload" feature, which generates a link that lets your friends send files to you. It uses UPnP, STUN, and a connection test Web service to set up incoming connections, and can generate QR codes from the links to uploads and downloads.