Adobe Photoshop, GIMP, Adobe Lightroom, darktable, digiKam, ACDSee Photo Studio, Capture One, Pixelmator, Adobe Photoshop Lightroom Classic, RawTherapee, Fotoxx, ON1 Photo RAW, Corel AfterShot Pro, WidsMob FilmPack, Glimpse Image Editor are some alternatives to DxO PhotoLab.