StarUML is a software engineering tool for system modeling using the Unified Modeling Language, as well as Systems Modeling Language, and classical modeling notations. It is published by MKLabs and is available on Windows, Linux and MacOS. History StarUML is the successor of an object oriented modelling software called Plastic. Plastic 1.0 was published in 1997 to support the OMT notation. The version 1.1 published in 1998 dropped the OMT to support in favour of UML. The last version under this brand was called Agora Plastic 2005 and was published by the Korean company Plastic Software Inc, Seoul. It was an internationalized product, compliant with UML 1.4,and claiming to support the Object Management Group's MDA approach. The software was renamed StarUML 5.0 in 2005 with a view to publishing it as open source. The aim was to provide UML 2.0 support as well as the capability to use third-party plugins. The first public release was published August 2006 on SourceForge under GNU GPL license. The source code included multiple copyright notices for the period 2002-2005 by Plastic Software Inc. The software targeted at that time the Win32 platform and was essentially written in Delphi. The software evolved over several years as open source project and was recognized as an MDA tool with a capability to assist in reverse-engineering existing code. A last open source version is published in 2010. It may still be used nowadays, but according to the owner of the product, if would no longer be maintained nor supported. A crowdfunding campaign was launched in 2014 to finance a revival of the project under the name StarUML 2. The aim of the initiative was to add support for other languages than Java and other modeling notations than UML. The campaign failed to raise the needed funds: less than 1000 USD were collected, that is 1% of the campaign's target. The South Korean company MKLabs publishes since 2014 the new versions of StarUML and licenses them under a commercial proprietary scheme. The old open source version is referred to as StarUML 1 in the product documentation, and the version numbering was restarted at 2.0.0. which was released in 2014. A multiplatform version 3.0 was released in 2018 for Windows, Linux and MacOS. Version 4.0 was released in 2020. It included timing and interaction overview diagrams. Version 5.0 was published in 2022 and supports Apple Silicon. Features StarUML offers object