The free program for working with images, creating icons, etc called Gimp is similar to Photoshop and is what we've used for years to create various icons and things, resize images and make animated .gifs.
We accidentally stumbled upon LibreOffice when we were looking for good writing software. OpenOffice had been our choice of MS Office alternative for the past few years and so we were surprised to learn about this other program. It's been around for a few...
We use OpenOffice for all of our documents, spreadsheets, etc. as opposed to the rather expensive MS Office. This free program packs a lot in its goodie bag. We've not found anything we needed to do that we could not do with this program.