SailfishOS SDK is a collection of tools for developing SailfishOS applications.
QtCreator integrated development environment (IDE);
Mer build engine for cross compilation;
The SailfishOS Emulator;
Tutorial, Design and API Documentation;
Repositories for additional libraries and open source code;
The Sailfish OS is a mobile-optimized operating system (Linux core) with an Qt Platform.
A host machine running a Linux operating system
Oracle’s VirtualBox version 4.1.18 or higher pre-installed on the host machine.
You should install the VirtualBox supplied by your distribution.
About 5GB of free disk space
4GB of RAM or more is recommended