Luminance HDR is an open source graphics application that is used to create, edit and tone-map high dynamic range (HDR) photos. It allows you to merge multiple exposures of the same scene into one HDR image, adjust the tone mapping of the image and apply various filters to enhance the image. It also supports several HDR formats including OpenEXR, Radiance RGBE, and TIFF. It is easy to use, intuitive and cross-platform, making it a great choice for amateur and professional photographers alike.
You can't really edit images in LHDR