Perl - Highly capable, feature-rich programming language with over 26 years of development
B4X - Cross platform development tools for native iOS, Android, desktop and server applications.
C++ - Has imperative, object-oriented and generic programming features, while also providing the facilities for low level memory manipulation
Apache Cordova - Platform for building native mobile applications using HTML, CSS and JavaScript
Pike programming language - Dynamic programming language with a syntax similar to Java and C
RhoMobile - RhoMobile is a based on the Rhodes open-sources framework that has a massive range of advanced development tools for creating data-centric, native mobile consumer, cross-platform and enterprise application.