Hi Eddie,
I always import a picture to develop in Adobe Lightroom, there is a gradient filter in there (amongst many other manipulation tools) but I then opted to open it in Nik efex HDR pro (a Lightroom plug in) for no other reason than to have a quick shufftie of the picture in the various presets - there is also decent grad filter sliders in there too.
One such preset looked quite nice although more fanciful than the original tone of the photo, but it's all a bit of free artistic license anyway - so I saved it with that preset then back to lightroom where I reduced the volume of baron sky with a crop.
Noticed some dust specs on the photo so opened it in in Adobe Elements and removed them along with a bit of I'm not sure if it was wispy cloud or whatever up in the top right of the photo, added a quick border and converted to JPEG.
A pro would have I'm sure made 100% better go of it and if it was my picture to edit then I'd have spent much more time on it but it lets you see what a novice can do with a few decent programs and access to youtube.
The photo is actually quite good, bit of a blown out sky and dark foreground but a nice picture all the same.
Iain