MegaN64!

Project64 is a Nintendo 64 emulator for the Windows platform. It employs a plugin system that allows 3rd party developers to implement their own software. It is an emulator, meaning that the user has the option to run ROM files that can be extracted from a Nintendo 64 game cartridge.

Mupen64Plus is a plugin-based N64 emulator for Linux which is capable of accurately playing many games. Included are four MIPS R4300 CPU emulators, with dynamic recompilers for 32-bit x86 and 64-bit amd64 systems, and necessary plugins for audio, graphical rendering (RDP), signal co-processor (RSP), and input. There are 3 OpenGL video plugins included: glN64, RiceVideoLinux, and Glide64.

UltraHLE was an emulator for the Nintendo 64. It was hailed as a massive step forward in emulation technology on its 1999 release. Emulating the N64 (which was only 3 years old at the time) made it the first of the N64 emulators to run commercial titles at a playable frame rate on the hardware of the time.

CEN64 is a Nintendo 64 emulator.

1964 is a Nintendo 64 emulator for Microsoft Windows, written in C and released as free software. It is one of the oldest and most popular N64 emulators, supporting many commercial N64 games. With the right plugins, you can play almost any Nintendo64 game on your PC.

An open-source N64 Emulator for Windows.

N64oid is the very famous N64 emulator optimized for Android. It is a port of Mupen64plus, along with Ari64's ARM dynarec (and gles2N64 as an option).

Sixtyforce is an emulator that runs Nintendo 64 games. It does this by dynamically translating the code that a Nintendo 64 uses into something your Mac understands. Nearly every part of a Nintendo 64 has been painstakingly recreated entirely out of software to pull off such an amazing feat.

Fake64 one of the older N64 emulators, but is suprisingly fast, as well as it can support a wide range of games.

n64iphone is a Nintendo 64 emulator for jailbroken iPhone 3GS and iPod Touch Late 2009 devices. It is still currently under heavy development and is available on Cydia: http://cydia.saurik.com/package/com.zodttd.n64iphone .