OS:  
- Windows 32 bit
- Windows 64 bit
- Max OS X 64 bit
- Mac OS X 32 bit
- Linux 64 bit
- Linux 32 bit
The following is a list of the plug-ins available in PyAstro the indicated sub-menus:
1. Color Tools:
2. Effects:
3. Layer Tools:
4. Misc Tools:
5. Sharpen:
1. Color Tools:
- Auto set black point
- Bayerize image
- Clip image brightness
- De-Bayerize image
- Enhance dynamic range
- Invert layer
- Merge color channels
- Neutralise sky color
- Pick out stars
- Purge red sky
- Scale image brightness
- Scale image darkness
- Split color channels
- Undercut image brightness
2. Effects:
- Enhance star colours
- Enhance star luminosity
- Enhance using SVD layers
- Round stars
- Set image dark sky
- Star haloes
3. Layer Tools:
- Divide layers by flat
- Merge all layers
- Save all layers
- Scale brightness of all layers
- Scale darkness of all layers
- Set all layer modes
- Stack image layers
- Stack star layers
- Stack sun layers
- Subtract dark from layers
4. Misc Tools:
- Image file converter
- Image list converter
- Image quick save
- Pixel peek
- Resample image
5. Sharpen:
- High pass filter
- LRGB sharpen
- Smart sharpen
- Unsharp mask