...might be commercial ($) software, Gimp is completely free to use (and modify) to your heart's content. It is available for Unix-like OS (including linux, Solaris, the BSD family of OS such as FreeBSD and OpenBSD, et cetera), Microsoft's Windows, and Apple's OSX. It is a lot more complex than the proverbial Etch A Sketch - but it does so much more, and probably has as many plug-ins as PhotoShop, if not more.How can I edit my pictures to make them smaller?
You can use many programs for image resizing. Adobe Photoshop, Apple Photos, Gimp, InfanView and Microsoft Photo Editor to name a few. If you don’t have any of these programs, here are some links to free online photo resizing tools:
Free Online Picture Resizer - Crop and Resize photos online for free
Online Image Resizer - Resize digital photo, images or pictures online
Resize Images online
Resize Images Online at ResizePic