Ruby on Rails is an excellent framework to learn not only because it’s a great web application framework, but also because it has a large and helpful community. In fact, chances are you can learn how to use Rails in a multitude of ways, just by searching the web.

We’ve taken it upon ourselves to compile some excellent tutorials that Rails beginner’s and zealots alike can use while working in the popular web app framework and continue exploring the endless possibilities of Rails.

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Back in October we wowed you with 20 Excellent Ajax Effects You Should Know. The post went on to become one of the most popular ever published at Nettuts+. This time around we have twenty more equally excellent Ajax effects for you to know and love.

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Have you ever wanted to be a freelance web developer? Whether you’re working for the man or developing as a hobby, there are some tried and tested tips you can use to ease yourself into the life of a freelance web developer - even if you only do it part-time.

By working with many and varied clients, your web dev and business skills will grow at a rapid pace. If everything goes right, you should be able to make a good living doing something you love.

So today we’re going to go over how to actually become a freelance web developer, and all that goes with it.

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Here are 50 of our favorite free image galleries that you can quickly plug into a design. They’ve been built with everything from CakePHP to jQuery to Ruby on Rails. A shout-out to all the developers involved in sharing their work with the community!

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Web developers these days are often expected to know and work in multiple languages. As a result, it’s tricky to learn everything a language has to offer and easy to find yourself not utilizing the full potential of some more specialized but very useful tags.

Unfortunately we haven’t been tapping into the full potential of these more obscure HTML tags as of late. But it’s never too late to get back into the game and start writing code that taps into the power of some under-used tags.

Here are ten of some of the most underused and misunderstood tags in HTML. While they might be less familiar, they’re still quite useful in certain situations.

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These days, most Flash developers know how to circumvent the multimedia platform’s short-comings and properly utilize its strengths. Here are some very clever Flash techniques that you can apply to your site, making them more useful, beautiful and unique.

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W3C validation isn’t very forgiving at times, but it allows you to see errors that are generated by your markup. Lots of errors and warnings thrown by the validator are a good indicator that your XHTML isn’t in very good shape, and might not look consistent across different browsers. Here are 10 sneaky validation problems that trip developers up, and how to avoid them.

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As a web developer, you can broaden your potential client base and add value for existing clients by listing ‘Wordpress’ as an area of expertise. Of course, unless you want to bluff your way through jobs, you’d better have the skill to back-up that claim. This collection will help.

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One of the best things about PHP is that it’s a great language to just “dive into”, thanks to its wide-ranging popularity. Anyone with the ability to hit “Search” on Google can quickly create a program. However, this also lends to a major criticism of PHP: it’s almost too easy to find and reproduce bad code.

Here are 10 PHP mistakes that any programmer, regardless of skill level, might make at any given time. Some of the mistakes are very basic, but trip up even the best PHP programmer. Other mistakes are hard to spot (even with strict error reporting). But all of these mistakes have one thing in common: They’re easy to avoid.

Take the time and make sure that your PHP is secure, clean and running smoothly by checking your site for these common PHP blunders.

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Web developers with social media savvy are in hot demand. Imagine what it would be like to promise your clients a web presence that is fully integrated with their Twitter strategy and makes it easier for their content to go viral on Twitter. Would be nice, no? Well — why imagine? The tools for web developers to add a touch of Twitter to any site are out there and easy to use. Trust us — your clients will love you for it!

There’s no better time to start utilizing Twitter integration tools than right now. Here are 10 of the most useful ways to start turning your site readers (or your client’s customer base) into Twitter followers, and vice versa.

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