Open Hub

Ohloh was founded by former Microsoft managers Jason Allen and Scott Collison in 2004, joined by developer Robin Luckey.{{cite web | title = Startup Helps Assess Open-Source Projects | author = Darryl K. Taft | work = eWeek | date = 13 July 2006 | url = http://www.eweek.com/article2/0,1895,1988547,00.asp | archive-url = https://archive.today/20120629214206/http://www.eweek.com/article2/0,1895,1988547,00.asp | url-status = dead | archive-date = 29 June 2012 | access-date = 2007-08-29 }}{{cite web | url= http://www.heise.de/newsticker/meldung/75652 | title= Ehemalige Microsoft-Manager gründen Infoportal zu Open Source |date=19 July 2006 |work= Heise Online |language=de | access-date = 2007-08-29}} On 28 May 2009, Ohloh was acquired by Geeknet, owners of the popular open-source development platform SourceForge.{{cite web|url=http://www.ohloh.net/announcements/sourceforge_acquires_ohloh|title=SourceForge Acquires Ohloh – Black Duck Open Hub Blog|access-date=29 May 2009|archive-date=20 December 2011|archive-url=https://web.archive.org/web/20111220012208/http://www.ohloh.net/announcements/sourceforge_acquires_ohloh|url-status=dead}} However, Geeknet sold Ohloh to the open-source analysis company Black Duck Software on 5 October 2010. Black Duck integrated Ohloh's functionality with their existing products to advance the site into a major resource for FOSS development.{{cite web|title=Geeknet Sells Open Source Directory Ohloh To Black Duck Software|url=https://techcrunch.com/2010/10/05/geeknet-sells-open-source-directory-ohloh-to-black-duck-software/|publisher=TechCrunch|access-date=5 October 2010}} On 18 July 2014, Ohloh became Black Duck Open Hub.{{cite web|url=https://twitter.com/bdopenhub/status/490265903519760384|title=Black Duck Open Hub on Twitter}} In late August 2014, the Black Duck Open Hub's Organizations feature moved out of Beta and into Version 1.0.{{cite web|url=http://blog.openhub.net/2014/08/unveiling-the-retooled-organization/|title=Unveiling the Retooled Organization}}

By retrieving data from revision control repositories (such as CVS, SVN, Git, Bazaar, and Mercurial), Black Duck Open Hub provides statistics about the longevity of projects, their licenses (including license conflict information), as well as software metrics such as source lines of code and commit statistics. The codebase history informs about the amount of activity for each project. Software stacks (list of software applications used by Black Duck Open Hub's members) and tags are used to calculate the similarity between projects.

Global statistics per language measure the popularity of specific programming languages since the early 1990s.{{cite web | title = PHP Eats Rails for Breakfast | author = Robin Luckey | work = Ohloh | date = 8 October 2006 | url = http://www.ohloh.net/articles/php_eats_rails | access-date = 2007-08-29 | archive-date = 12 September 2007 | archive-url = https://web.archive.org/web/20070912220814/http://www.ohloh.net/articles/php_eats_rails | url-status = dead }} Those global statistics across all projects in Black Duck Open Hub have also been used to identify those with the most extensive continuous revision control histories.{{cite web | title = The World's Oldest Source Code Repositories | author = Robin Luckey | work = Ohloh | date = 31 August 2007 | url = http://www.ohloh.net/blog/worlds_oldest_source_code_repositories | access-date = 2008-01-03 | archive-date = 14 February 2012 | archive-url = https://web.archive.org/web/20120214061644/http://www.ohloh.net/blog/worlds_oldest_source_code_repositories | url-status = dead }}

Contributor statistics are also available, measuring open-source developers' experience as observable in code committed to revision control repositories. Social network features (kudos) have been introduced to allow users to rank open-source contributors. A KudoRank for each user and open-source contributor on a scale of 1 to 10 is automatically extracted from all kudos in the system.{{cite web | title = Ohloh Kudos | author = Robin Luckey | work = Ohloh | date = 4 May 2007 | url = http://www.ohloh.net/about/kudos | access-date = 2008-02-29 | archive-date = 17 April 2008 | archive-url = https://web.archive.org/web/20080417223635/http://www.ohloh.net/about/kudos | url-status = dead }} The idea of measuring open-source developers' skills and productivity on the basis of commit statistics or mutual rating has received mixed reactions in technology blogs.{{cite web | title = Is counting open-source code contributions really useful? | author = Bill Snyder | work = InfoWorld | date = 21 February 2008 | url = http://www.infoworld.com/t/tech-industry-analysis/counting-open-source-code-contributions-really-useful-208 | access-date = 2008-02-29}}{{cite web | title = Ohloh Tracks Open Source Developers | work = Slashdot | date = 21 February 2008 | url = http://yro.slashdot.org/firehose.pl?id=534130&op=view | access-date = 2008-02-29}} Contributor profiles may also contain a contributor supplied email address, and avatars loaded from Gravatar using that email address.

On 22 August 2007, a public beta of a web-service API was announced, exposing Black Duck Open Hub's data and reports to promote the development of third-party applications.{{cite web | title = Ohloh API Beta | author = Robin Luckey | work = Ohloh | date = 22 August 2007 | url = http://www.ohloh.net/announcements/api_beta | access-date = 2007-12-23 }}

On 18 January 2013, the team announced a new metric, the Project Activity Indicator (PAI). The PAI combines the number of contributors and the number of commits in an algorithm that weighs more recent activity more heavily than past activity. Activity is normalized so that all projects can be considered and weighed equally one against another; that activity assessment is scaled relatively to the number of project contributors and commits.{{cite web|title = "About Project Activity Icons" Open Hub Blog|url = http://blog.openhub.net/about-project-activity-icons/|website = blog.openhub.net|access-date = 2016-01-15|last = Sands|first = Rich|date = 18 January 2013}}

On 14 January 2014, the team announced a new score, the Project Hotness Score. The PAI shows long-term activity and growth on FOSS projects, but its requirement that there be at least a year of data means that new projects can't be ranked. The Project Hotness Score looks at activity over the past few weeks and evaluates daily activity to identify those projects. By design, the Project Hotness Score is highly volatile.{{cite web|title = About the Ohloh Hotness Score|url = http://blog.openhub.net/2014/01/about-the-ohloh-hotness-score/|website = blog.openhub.net|access-date = 2016-01-15|date = 14 January 2014|last = Degen-Portnoy|first = Peter}}

On 6 April 2016, the team announced Hub 3.0, which streamlined continuous integration and DevOps processes through policy management and rapid scanning capabilities.{{cite web|url=https://www.businesswire.com/news/home/20160406005160/en/Black-Duck-Releases-Latest-Version-Hub-Open|title=Black Duck Releases Latest Version of Hub Open Source Security Solution|date=2016-04-06|website=businesswire.com|language=en|access-date=2020-02-03}}

In 2012, Black Duck Open Hub launched Open Hub Code Search, a free code search engine based on the predecessor Koders.{{cite web|last=Bily|first=Susie|title=Ohloh + Code = Ohloh Code|url=http://meta.ohloh.net/2012/07/ohloh-code-ohloh-code/|work=Ohloh Blog|access-date=7 June 2013|archive-date=18 May 2014|archive-url=https://web.archive.org/web/20140518102202/http://meta.ohloh.net/2012/07/ohloh-code-ohloh-code/|url-status=dead}}

It could search over 21 billion lines of open-source code and filter by language, project or syntax, but was discontinued in 2016.{{cite web|title=Open Hub in 2016|url=http://blog.openhub.net/2016/04/open-hub-in-2016/|work=OpenHub Blog|access-date=15 April 2016}}

{{Portal|Computer programming|Free and open-source software}}

• Google Code Search
• Koders
• Krugle
• Protecode

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{{Wikidata property|1=P1972}}

• {{Official website}}

Category:Code search engines

Category:Free software websites

Category:Internet properties established in 2006

Category:American review websites

Category:Software metrics