DISCLAIMER: Software listed on this page is free to download and use. Some programs have advanced features that can only be enabled by purchasing the full program.
OPANDA Power Exif PowerExif is a professional tool to edit EXIF data in images. As the best assistant to modify image information for photographer & editor, PowerExif allows to add, modify, delete all Exif tag freely. Not only you could manage and record photographic data and GPS data of images, but also you could keep maxium 60,000 characters as multilanguage code in images.
Click here to download:
OPANDA
WWW.OPANDA.COM
FREE DCE Free DCE does the hard job of noise reducing and automatic balance control for you. And it is free!

The program works best if you have bad light condition (indoor, shadows etc..) and your image is somehow off. So if some of your images are already fine, you won't see much difference. DCE makes very delicate changes.
Click here to download:
FREE DCE 
http://www.mediachance.com/digicam/enhancer.htm
FastStone Image Viewer NEWEST VERSION!

FastStone Image Viewer lets you browse and view your images in a Windows-Explorer-like interface. The program supports all major image formats, including BMP, GIF, ICO, JPEG, JPEG2000, PCX, PNG, PSD, TAF, TIF, and WMF. It includes EXIF metadata support as well. You can crop, resize, flip, rotate, and adjust colors on your images and compare them side by side. Latest version now allows viewing of RAW files in all formats and image editing.

You can also convert your images from one format to another; you can even convert, resize and remname your photos in batches. You can also apply over 150 transitional effects in a slide show.
Click here to download the latest version
of FastStone Image Viewer
.
Combine ZP Focus Stacking Software

This a newer version of the FREE software demonstrated at the Metro Camera Club meeting on July 11, 2016. The old software, Combine ZM did not have a working "help" file available.

(click to download)
COMBINE ZP
Depth of Field (DOF) Calculator Software by Don Risi
The DOF calculator I use is only available for Android, and is available on the Google Play Store.
He​re is a link to another excellent DOF calculator that is available for both Android and iPhone, as well as an online version.  It gives the exact same results.

http://www.dofmaster.com

​Thanks, Don
darktable is an open source photography workflow application and raw developer. A virtual lighttable and darkroom for photographers. It manages your digital negatives in a database, lets you view them through a zoomable lighttable and enables you to develop raw images and enhance them.

https://www.darktable.org/
darktable
DaVinci Resolve is the world's only solution that combines professional 8K editing, color correction, visual effects and audio post production all in one software tool! You can instantly move between editing, color, effects, and audio with a single click. DaVinci Resolve is the standard for high end post production and finishing on more Hollywood feature films, television shows and commercials than any other software.

https://www.blackmagicdesign.com/products/davinciresolve/
DaVinci Resolve - Video Editor
Raw Therapee

It is open source, crossplatform and is availabel for Windows 64 bit, MacOs 64 bit and Linux.
 RawTherapee is a powerful, cross-platform raw photo processing system, released as Free Software (GPLv3). It is designed for developing raw files from a broad range of digital cameras and targeted at users ranging from enthusiast newcomers who wish to broaden their understanding of how digital imaging works to professional photographers.

RawTherapee provides a powerful suite of tools for you to produce amazing photos and showcase your creativity.

Available at https://rawtherapee.com/