OStatic

When you're working with a commercial software company, it's easy to keep up with their latest news: Between the company's Web sites, e-mail newsletters, conferences, and (increasingly) blogs, you can find out what is happening, and prepare yourself accordingly. Life in the open-source world is quite a bit messier, of course, in that there often isn't any central location or source for news. One of the key tools that the open-source community uses to keep in touch is blogs -- but it's not always easy to find all of the blogs on the subjects that interest you. That's where blog planets come in, providing a one-stop aggregation of many blogs on a particular subject.

Want to learn a new programming language or development framework? Books, magazines, and blogs are excellent -- but a growing number of people are also learning from screencasts, tutorials that combine someone's voice with a video of their computer screen. You can watch the teacher develop in real time, describing the actions that he or she is taking while they take place. There are many screencasts for open-source languages and frameworks, many for free and some for a nominal fee. Screencasts are playing a growing role in my attempt to keep up with new technologies, and you might well find them useful, too.

One of the fascinating trends that the Java world has seen in the last few years is the growth of non-Java languages that use the JVM (Java Virtual Machine). After all, if you create a new programming language, you will need to write it for a particular platform. If you want your language to be portable across platforms, you will need to implement versions for each of those platforms. By contrast, if you implement your language on the JVM, then your language will work on any system with a JVM, which is basically everywhere. Four of these languages -- Jython, JRuby, Groovy, and Scala -- are released under open-source licenses, and are increasingly popular choices for programmers who value portability.