Google has announced the latest batch of products it will axe, including social networking failure Wave, as well as Knol, Friend Connect and Gears.
Google said in October that it would be shutting down a number of products, particularly in its social networking portfolio, to focus time and investment on those it sees as core to its business.
"To recap, we're in the process of shutting a number of products which haven't had the impact we'd hoped for, integrating others as features into our broader product efforts, and ending several which have shown us a different path forward," said Google operations vice president Urs Hölzle, in a blog post.
Google Wave was one of the firm's first major moves into the social market, before Buzz and Google+.
The platform was launched as an invitation-only service at the 2009 Google I/O conference, and opened to the public in May. Wave proved popular with developers, but the wider world has been less than enthusiastic.
In August last year, Google said it would discontinue development of Wave and has now said that from January next year the product will become "read-only", and at the end of April will be turned off completely.
In five months' time, at the same time as Wave, Knol will also be shut down. Google urged Knol users to download their knols to files or migrate them to WordPress.
Knol was launched in July 2008, and is Google's version of Wikipedia. The search firm did relatively little to entice users to the site, which collects written articles on many different topics.
This lack of marketing activity has meant the industry has anticipated Knol's closure for a number of years.
Google said it will now focus its efforts on working with Solvitor and Crowd Favorite to create Annotum, an open-source scholarly authoring and publishing platform based on WordPress.
Google Gears is a Firefox and Internet Explorer extension that allows users to navigate on compatible web sites offline and synchronise data when they go back online. On 1 December this year, Gmail and Calendar offline will stop working across all browsers, and later in December Gears will no longer be available for download.
"This is part of our effort to help incorporate offline capabilities into HTML5, and we've made a lot of progress. For example, you can access Gmail, Calendar and Docs offline in Chrome," said Hölzle.
Google said its Friend Connect service, which allows web site owners to add social features to their sites, will be retired on 1 March next year.
The firm has also announced the end to its beta tool Bookmarks List, which will close on 9 December, as well as one of its renewable energy efforts.
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