What are some alternatives?
GIMP - GIMP is a multiplatform photo manipulation tool.
XnView MP - XnView is a free software that allows you to view, resize and edit your images. It supports more than 500 different formats!
Pixlr - Pixlr® makes it easy to transform everyday images into stunning works of art.
digiKam - digiKam - digiKam
Adobe Photoshop - Adobe Photoshop is a webtop application for editing images and photos online.
ACDSee Photo Studio - ACDSee becomes ACDSee Photo Studio — ACDSee Photo Studio Standard 2018 continues the ACDSee legacy