History: FLOSS Web Application with the longest predictable security support period

Tiki is the Free and Open Source Software Web Application with the longest support period

• FOSS -> http://en.wikipedia.org/wiki/Free_and_open_source_software
• Web Application -> http://en.wikipedia.org/wiki/Web_application (This includes Wiki, CMS, Groupwares or any application comparable to Tiki)
• longest support period: Tiki offers a choice of rapid release or Long Term Support (LTS). Tiki 12 LTS will be supported for 5 years.

Others FOSS Web apps with offer LTS

• Typo3 3 years
• MediaWiki 3 years
• Joomla 2 years and 3 months
• OpenERP 4.5 years
• Nuxeo 3 years
• With WordPress, you need to always stay in a rapid release cycle even when your site has all the features you need because WordPress doesn't offer an LTS verson and this is unlikely to change because the project leader is "philosophically opposed" to Long Term Support (LTS) versions.

Drupal

• At any given time, there are two major release series of Drupal which are supported. There is no fixed release schedule but historically, there is a release every 3 years, and it take about 18 months before extensions are ready for an average site, so you get an effective support for 4.5 years.

See also:

• Version Lifecycle
• FOSS Web Application with the most built-in features
• FOSS Web Application with the most contributors with direct commit access to the whole code base
• FOSS Web Application with the fastest release cycle

• Free and Open Source Software Web Application with the longest support period