cQRCode is a class that generates QR code images in GIF, JPEG, and PNG formats. It takes a string of information to encode and can either serve the image with the current script output or save it to a file. The size of matrix points and the error correction level parameters are configurable.
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).
cola is a C implementation of the COLA structure described in the paper "Cache Oblivious Streaming B-Trees" by Bender, Farach-Colton, et al. This algorithm is a drop-in replacement for B-Tree databases/indexes which performs faster on spinning disks than B-Trees do on SSD. It's asymptotically optimal in terms of data transfers to and from disk. For example, random key inserts are turned into linear sequential writes while maintaining the property which queries always require, at most, precisely log N blocks read sequentially (but not contiguously) from disk (or half that, on average).
NamedManager is a Web-based DNS management system designed to make adding, adjusting, and removing zones/records easy and reliable. It supports using both Bind9 and Amazon AWS Route53 as a backend DNS server for managed zones. It features a modern AJAX Web interface, with IPv4 and IPv6 support and full UTF-8 support allowing internationalized domain names.