Berkeley DB comes with C and C++ APIs. Unfortunately, the C++ API is a thin wrapper neglecting modern C++ designs, such as smart pointers, I/O streams, iterators, operator overloading, etc.. STLdb4 makes C++ programming with Berkeley DB simpler.
A talk from Kevlin Henney that addresses the issues presented by asynchronicity in system architecture,
with an emphasis on the methods and techniques used to model system features as
objects and represent them in a robust C++ framework.
Docs for Twisted, an event-driven network programming framework written in Python.
Twisted supports TCP, UDP, SSL/TLS, IP Multicast, Unix domain sockets, a large number of protocols (including HTTP, NNTP, IMAP, SSH, IRC, FTP, and others), and much more.
Taffy is an object-oriented scripting language based around Ruby, Objective-C, Smalltalk, and AppleScript. It uses named arguments (exclusively), allows spaces in method names, has automatic garbage collection, and much more.
LINGOT is a musical instrument tuner. It’s accurate, easy-to-use, and highly configurable. Originally designed as a guitar and bass tuner. It looks like an analog tuner, with a gauge indicating the relative shift to a certain note.
Tired of carrying all the club and discount cards? At justoneclubcard.com, you can enter all your cards and it produces a single image with all the bar codes. Print it and voila: One card fits all!