All softwares that are helpful in FSc. Download free from here like calculators, graph viewer, IDE etc.
1. Dev C++ | An IDE for C and C++
Orwell Dev-C++ is a full-featured Integrated Development Environment (IDE) for the C/C++ programming language.
2. Code::Blocks
Code::Blocks is a free C, C++ and Fortran IDE built to meet the most demanding needs of its users. It is designed to be very extensible and fully configurable.