Today Opera released the final version of Opera 10, the long-awaited new entry in the company’s browser family. It’s free and comes in 43 languages.

Opera points out three things that it says users "must try" in this version:

Facebook developers may soon see more user interest than ever before, thanks to a site tweak.  The Facebook Share prompts have been altered in a way that Facebook thinks will have some significant effects.

Microsoft announced that the Bing iPhone and Mac software developer kit (SDK) is available for download at Bing’s CodePlex. It is open source under the Microsoft Public License (MS-PL).

This week Google released the latest version of the AdWords API (v2009) to all advertisers after releasing it to a limited group back in June. The new version offers users some new features, and Google says it comes with greater speed at a lower cost.

Last month, an event was hosted by the Google Wave team called Google Wave Federation Day, which was described as an inaugural event for people looking to get involved by providing their own wave services.

At the event, Google discussed the protocol and system architecture behind Google Wave, and talked about how they need to get lots of developers working on it, because it is such a huge vision. That vision is for there to be many Google Wave providers, because as Google says, it won’t be complete without non-Google Google Wave providers.

You don’t hear as much about Second Life these days as you did several years ago. For a while, articles were being written left and right about how to leverage this virtual world from Linden Lab as a business tool. Lately, not so much.

Back in June, Microsoft launched the Bing Toolbox. This is pretty much what you might consider a one-stop shop for Bing webmaster, developer, and advertiser resources. Microsoft described the Toolbox as an organized set of tools for the entire Bing community, and a one-stop portal to all of the services you need to drive traffic and increase engagement with your site and applications.

Last week, Facebook announced an update to the Open Stream API, which allows integration of Page streams with applications. Now, Facebook has opened up the new Mailbox and Notification APIs, which allow developers to provide users with more ways to interact with core Facebook features within their apps.

This week Google unveiled the Data Feed Query Explorer for the Google Analytics Data Export API. This was essentially created to help users get a grasp on what can be done with the API.

In July, Friendfeed launched version 2 of its API in beta. The company said it was focusing on making it simpler and easier to use. Now the API has already left beta status.

Facebook has just announced some updates to the Open API Stream. Among these are simpler JavaScript methods for publishing, Facebook Pages support, and attribution. A spokesperson for Facebook tells WebProNews:

With the big Yahoo Microsoft deal announced, there are still a lot of questions out there, despite the significant amount of information the companies have shared thus far. We know that Bing will become the search engine used in Yahoo searches. We also know that Microsoft will acquire an exclusive 10-year license to Yahoo’s core search technologies.

Earlier this year Yahoo announced that the Yahoo Blueprint Platform was being extended from  several hundred mobile devices in several thousand. Now the company has opened it up to third party developers.

The BluePrint is a platform on which developers can create mobile websites. It uses simple XML, and is the same technology Yahoo used to build oneSearch and the Yahoo.com mobile home page.

According to multiple reports, Google is now offering developers a crack at some Android 2.0 features at the Android code repository. Android 2.0, which was codenamed "Donut," was discussed at the Google I/O developer conference earlier this year. To listen to what Google had to say, watch the following clip (the Android part starts a couple minutes in).

Justin.tv, the live streaming video site, which recently launched a Facebook app to allow users to watch video right from Facebook, has now released an API. The goal is to get people developing much more useful ways to use Justin.tv.

PayPal announced that it is opening an API to developers to allow them to embed PayPal’s payment system into their own apps and platforms. The company, a subsidiary of eBay, says this is the first global payment platform to open to third-party developers.

FriendFeed announced today that it has released version 2 of the FriendFeed API for beta testing. The focus, according to the company, is making the API simpler to use.

Facebook’s version of a virtual currency system is finally getting off the ground.  Facebook Credits can now be used in conjunction with third-party applications, and not just the official Gift Shop.

Last year, Yahoo debuted its YQL language, which lets users query, filter, and join data across web data sources or services on the web. YQL or Yahoo Query Language is based on a SQL-like language, and it helps apps run faster with fewer lines of code.

Today, Yahoo announced a new feature for YQL, and that is the Insert/Update/Delete feature. A spokesperson for Yahoo tells WebProNews this extends the platform by adding “write" capability to its capabilities, including YQL Open Data Tables and Execute."

Mozilla has launched a new directory with the goal of providing a one-stop shop for open web tools and resources for developers. It is called the Open Web tools Directory.

The reason Mozilla says it decided to start this directory is simply because there isn’t one like it. "There’s no central index of these tools," the company says in a blog post.

Google has launched a new version of the AdWords API. The company says this version offers more speed, scale, and flexibility to developers at a lower cost.

The AdWords API lets developers build apps that interact with the AdWords platform. With the API, users can: