I just need some .c and .h files to draw sprites and text, with documentations.

This might be useful for you:
http://nspforge.unsads.com/p/nspireio
Text Input/Output + documentated header files.

And a function for drawing sprites can be found here.

Debian with Linux Kernel 2.6.18.

I made a small tool that lets you upload a zip archive containing source code of an nspire program and compiles it.
You can modify the EXE and OBJS variables in the makefile to whatever you want.
http://compu.vortexirc.com/compiler/

It uses arm-elf-gcc 4.4.6 because I have problems to get 4.5 to work.
__builtin_unreachable() was added in 4.5 so you will always get a warning:
/home/julian/ndless/include/os.h: In function 'exit':
/home/julian/ndless/include/os.h:389: warning: implicit declaration of function '__builtin_unreachable'

Uhm, lol TI. 2.1.1 when 3.0 already exists?

Metro 2033:
It's nice, but really hard sometimes
Crysis 2:
I played only crysis wars.. so idk
BFBC2:
Map is too huge, I don't like getting sniped out of nowhere lol
I am more a Call of Duty player
Mafia II
Nice story, but I don't like it.

If I would get 100€, I would only buy Portal 2

EDIT: I have a talent at reading only the half of a post
But I would save the money and wait for new games to come out.

Maybe not the latest build.

A computer patcher might be useful, but in this case, I have to write only at two addresses and I think this could be better done with an on-calc patcher. Modifying an OS Image and loading it with OSLauncher would waste around 3,5MB of space on the calc.