Project64 is a free and open-source Nintendo 64 emulator written in the programming languages C and C++ for Microsoft Windows.

The emulator has basic features, supports multiplayer, and allows alternating the aspect ratio without cropping or quality drop.

Jabo initially did not intend on being the RDP/Graphics developer, having a greater interest in assembly language and the central processing unit (CPU) but found himself often working on the graphics aspects.

[11] However, in April 2013, Zilmar released both Project64 2.0 and an official repository of its source code that was made available on the Project64 website making the software fully open-source and accessible to everyone.

When Project64 2.3 was released, a nagware screen began to occur after a number of uses of the software which grew more persistent with successive launches as a forced waiting period is installed.