BASin is a bit different than other emulators. Where most are geared towards playing games, BASin is setup for programming.

BASin is an advanced Sinclair Spectrum development environment based around the Sinclair ZX Spectrum 48k and 128k models. It provides a user-friendly and powerful IDE (Integrated Development Environment) which makes programming in this exciting and frivolous language an absolute joy. It is not just a simple interpreter - BASin utilises a very fast and accurate emulation engine which guarantees a high degree of accuracy and compatibility with other Emulators and their file types[1].