Many companies use this software for editing photos.
I use this for our company work and this works perfectly for image editing process.
GIMP - GIMP is a multiplatform photo manipulation tool.
authorSTREAM - authorSTREAM enables presenters to upload & share PowerPoint, Keynote & PDF presentations online; embed in blogs, convert to video and share on social networks.
Affinity Photo - Affinity is the imaging and design suite for creative professionals exclusively for Mac.
PreZentit - Prezentit is an online presentation solution based on JavaScript that comes with new online collaboration tools.
Krita - Krita is a professional FREE and open source painting program. It is made by artists that want to seaffordable art tools for everyone. Concept art. texture and matte painters, illustrations and comics.
Zentation - Affordable webinar software. Create online presentations with synchronized video and PowerPoint.