HalfNES v0.57 is released. HalfNES is an open-source emulator for the Nintendo Entertainment System, written in Java. Currently, it only runs as a standalone Java SE application.

Current Features:
- Joystick support through both Direct Input and xInput (thanks Zlika)
- Supports Mapper 0, 1, 2, 3, 4, 5, 7, 9, 10, 11, 19, 21, 22, 23, 24, 25, 26,
- 34, 38, 64, 66, 68, 69, 70, 71, 78, 87, 89, 93, 94, 97, 107, 118, 119, 140, 152,
- 0, 185, 200, 203, 226, 240, 246
- SRAM save support (no save states however)
- Accurate sound core
- Fast video code with NTSC filter (filter is still slow)
- Full screen support
- Cross-platform portable
- Added options dialog for easier remapping of keys

HalfNES v0.57 Changelog:

-PPU is now pixel accurate. Meaning that many glitchy games are now completely fixed. However it also means that performance is worse. -MMC3 and MMC5 scanline counters have been rewritten to be more accurate. Fixed games: -Marble Madness -Laser Invasion -Mickey's Adventures in Letterland -Rad Racer -Slalom -Tiny Toon Adventures (the status bar was off by one scan line before) -Mega Man 3 (displays same glitchy lines as real hardware) -Every Namco 163 game (scanline counter was broken) Also passes several more of blargg's PPU and MMC3 tests. I haven't fixed all of the MMC3 based multicart mappers yet.

Download: HalfNES v0.57
Source: Here