Take RAW images

Set you camera to take RAW. Most of the cameras allow saving the image in both RAW and JPEG formats simultaneously.
If you are used to take JPEG images RAW+JPEG is the best choice, as you always have a usual JPEG shot along with RAW.

Open RAW image in HDRAW application

Drag-n-drop RAW image to HDRAW application (or open the file within HDRAW app).

A RAW image can be processed different ways resulting in various look of the final pictures. HDRAW offers you several presets so that you should be able to choose the one that best matches what you wish to get. Click on the thumbnail of your choice.

Once you've chosen a preset, you see a larger size preview. The things were easy so far and now you can save or share the image immediately! Click 'Save' or 'Share', the HDRAW will calculate the full resolution image and either save it to the disk or send it.

Alternatively, you can adjust the tone mapping parameters.

We are going to add materials on HDR and Tone Mapping in this section.

To anyone who is interested in HDR we recommend to read probably the best article describing HDR and Tone Mapping: The Art of HDR Photography by Uwe Steinmueller

Technique

You are probably aware that HDR technique involves taking several exposure-bracketed images, and the fusing them into a high dynamic range image and tone map that HDR image.

In fact, multishot HDR is much more effective than one-shot HDR, as the exposure bracketing allows capturing of a much wider dynamic range.
In the same time, multishot HDR requires more complex workflow, as you have to merge exposure bracketed images, which are usually disposed, contain moving objects and have varying illumination (say, due to moving clouds).
As a reward, you will get superb rich-detail images, picturing not what a camera can capture, but what a human eye can see.

Tools