Arm Keil MDK vs Geany

Arm Keil MDK is a toolchain for embedded software targeting Cortex-M and Ethos-U processors. MDK v6 supports command-line, IDE, and continuous-integration workflows across major operating systems. It includes Keil Studio extensions for Visual Studio Code, Keil μVision, Arm Compiler for Embedded, and Arm Fixed Virtual Platform models. Software packs add device and board support, middleware, components, code templates, and example projects independently of the toolchain. Keil Studio supports CMSIS workflows with an integrated debugger and extensions for creating, building, and testing embedded applications. Listed integrations include CMSIS-FreeRTOS, Keil RTX5, MDK-Middleware, IoT clients, CMSIS-DAP, ULink, and third-party debug adapters. Community is for non-commercial use. The listed MDK v6 Essential plan costs $99 a month per license; Professional costs $199 a month per license and adds Arm Virtual Hardware, functional-safety compiler tools, and legacy tools including Arm Compiler 5. Keil μVision is available only for Windows hosts.

Geany is a free, lightweight integrated development environment for Linux, macOS, and Windows. It provides syntax highlighting, code completion, call tips, and code folding for languages and file types including C, Java, PHP, HTML, Python, Perl, and Pascal. An embedded terminal emulator is included, and plugins can extend the editor. Geany supports macro recording and column editing, but not multi-cursor editing. The project distributes it under the GNU General Public License, version 2 or later. Linux, BSD, and similar systems are directed toward distribution packages, including packages named for Debian, Fedora, and Ubuntu. Prebuilt Windows and macOS binaries are available from geany.org, along with links to additional third-party packages and a portable Windows version. Building from source requires GTK3 libraries and headers, dependency libraries, and C and C++ compilers. Geany has no free trial because the listed plan is free.