Download Ndless v3.6 for OS v3.6 and follow the User Guide.
Developers, follow the Developer Guide.
Ndless opens the TI-Nspire classic/CX to third-party development. You can use its SDK to write C/ARM assembly native programs, and install Ndless on your TI-Nspire to run community programs.
This is an Open Source project.
You like it? Support the Ndless effort, 
or 
ndlessly 