WSGID When your WSGI app becomes a nix daemon. Mongrel2 by Zed Shaw has interested me for quite some time, but the biggest drawback was that there are not many Python frameworks that work directly with Mongrel2. wsgid solves the problem, it is a WSGI server for Mongrel2 and can thus then connect frameworks that can run under WSGI - for example, Mongrel2 can be used as an HTTP server for a distributed Django installation. By using ZeroMQ in Mongrel2, the whole thing is then significantly more flexibly structured than with the classic (FCGI-based) server integrations.
Typekit. I'm still researching web fonts and their simple use in various situations, especially the search for useful fonts. Typekit looks quite interesting in this regard, although their free offer is somewhat limited, the prices for the larger packages are not entirely utopian - at least if their claim of efficient delivery of the fonts via HTTP really stands up to reality. In principle, you rent the fonts for use instead of buying and hosting them yourself. There are a number of plugins for Wordpress, this one from OM4 also seems to be currently maintained.
Elnode - an Emacs version of node.js. Another project from the "because it can be done" category - I don't believe anyone would spontaneously answer "Emacs" to the question "how do I want to run my web services". But well, the operating system with built-in basic text processing functions can also represent an asynchronous web server.
Replication, atomicity and order in distributed systems. A very interesting article about distribution and ordering in distributed systems with parallel execution - because it's not really trivial. Worth reading just for the links to various projects in that area. At the end a bit of a cliffhanger, because it refers to an upcoming article - hopefully it will come, because its topic sounds interesting too.
Kivy: a crossplatform framework for creating NUI applications. Interesting new GUI library for Python, runs on various platforms (and in addition to the three major desktop environments, Android is already included as a mobile one) and can use OpenGL to accelerate output (internally they have a JIT that compiles the basic functions and thus enables fast execution).
Simple, Secure, Scalable Web Development with Opa. The Opa book is, at first glance, a very comprehensive introduction to the Opa language and its motivation. What also excites: the installation under Linux is based only on basic packages, you don't first download half of the internet and install just because you want to use a language. (What is rather not so positive with Opa experiments: very long compile times - even the examples provided in the book, which are not exactly overwhelmingly large, quickly reach quite significant 15-20 seconds ...)