Arduino IDE - Arduino is an open-source electronics prototyping platform based on flexible, easy-to-use hardware...
Python - Python is a clear and powerful object-oriented programming language, comparable to Perl, Ruby, Scheme, or Java.
PlatformIO - Next-generation IDE for IoT
Rust - A safe, concurrent, practical language
MINIBLOQ - miniBloq is an open source graphical programming environment for Multiplo™, Arduino™, physical computing devices and robots.
Java - A concurrent, class-based, object-oriented, language specifically designed to have as few implementation dependencies as possible