: SAP offers a "Free Tier" version to help developers build multi-channel mobile and web applications. You can start with their tutorials on the SAP Developers portal .
There are several distinct things called "MDK" that offer free downloads. Depending on what you are looking for, here are the most common options: Arm Keil MDK (Microcontroller Development Kit) : MDK Free Download
: You can download a free, non-commercial version of this embedded application development tool on the Arm Keil website . It is designed for Cortex-M processors and has no code size limit for hobbyist use. : SAP offers a "Free Tier" version to
: This is a free implementation of the MIX computer and its assembly language. You can download the source tarball from the GNU FTP site or through mirrors. Depending on what you are looking for, here