RIOT (Radical Image Optimization Tool)

It's a program that allows us to reduce the space occupied by an image, for example if we post on the Web, this is not to use strange formats (actually, you can upload images of many formats), or specific algorithms compression, but tries to let us use the best tools we already have.

For example, we have an image in JPEG 4MB of which we can minimize the space to put it on the Web via the GUI RIOT we will see how we're going to compress the image further, trying to Jpeg compression up (but also trying to exclude extraneous data as EXIF profile, comments, etc.).. The initial and final size of the image are written very clearly, so very easy to make a comparison.

RIOT tries to do his best not only lossy graphic formats, just like JPEG, but also non-lossy formats such as GIF and PNG.

Compress the image if there is sufficient, you can also resize it with good algorithms (Catmull Rom, Lanczos and some others): here, the advantage is that we can see the initial and final images side by side and easily decide if the quality of chosen algorithm satisfies us.

RIOT is also in portable version (no installation required).

RIOT

Microsoft I.C.E.

It a free program that allows Microsoft to create panoramic pictures with ease. And it fully automatic (though the pictures should be numbered correctly), and requires no special effort or knowledge by the user.
And with wonderful preview, which gives you a pretty good idea of the final result. The quality of the resulting panoramic picture is excellent, only sin that in some cases (at least among the tests I did) there was some slight burr in one of the junctions between the pictures (while the preview was absolutely perfect).
Overall, the program is very good, especially for beginners.

Microsoft I.C.E.