<Li> GTK+: An open source widget toolkit for Unix - like systems with X11 and Microsoft Windows . </Li> <Li> Haxe: An open source cross-platform language . </Li> <Li> Juce: An application framework written in C++, used to write native software on numerous systems (Microsoft Windows, POSIX, macOS), with no change to the code . </Li> <Li> Lazarus: A programming environment for the FreePascal Compiler . It supports the creation of self - standing graphical and console applications and runs on Linux, MacOSX, iOS, Android, WinCE, Windows and WEB . </Li>

Malware that is portable to all operating systems or platforms is considered web-based code