Final answer:
The standard software for programming an Arduino is the Arduino IDE, using a simplified version of the C/C++ languages.
Step-by-step explanation:
The software used for programming an Arduino is typically the Arduino IDE (Integrated Development Environment), which uses a variant of the C/C++ programming languages. The Arduino language is based on C/C++ and simplifies some aspects to make it easier to program the microcontroller. While there are other ways to program an Arduino, such as using Python with certain software or assembler language directly, the standard and most common method is through the Arduino IDE using its C/C++-like language.