You can freely download an evaluation version of the SeeScore SDK for the platform of your choice. It will show a faint ‘watermark’ over the score for evaluation, and can be upgraded with a key file to remove the watermark for app release by purchase of a licence.
The SDK includes:
For iOS and OS X you will need Xcode to build the sample app. On Windows you will need Visual Studio (Express) 2013, and for Android you can use Android Studio, or any build environment of your choice