JSPspEmu Git (2014/04/26) is released. JSPspEmu is a PSP emulator made using javascript (actually typescript). It will work with any modern browser. Though the first version work only works with Chrome (desktop and android). At this point it can run some demos.

JSPspEmu Git Changelog:
- Fixed sceRtc.sceRtcGetCurrentTick
- This fixes rtctest fps and goldminer
- Some speed improvements on webgl rendering …
- Improved Integer64 multiplication in some cases
- Restructure display
- Improved wait vblank start
- Disabled wait vblank delay (for now)
- Improved setImmediate speed
- Reduced delay

Try online: JSPspEmu Git (2014/04/26)
Source: Here