RawTherapee is a free, cross-platform raw image processing program
GottenGeography
An easy to use geotagging application for the GNOME desktop, which aims to have a very streamlined and intuitive interface that makes it easy to apply geotags to photographs.
Darktable
darktable is an open source photography workflow application and raw developer
GThumb
gThumb は、GNOME デスクトップ用の画像ビューアおよびブラウザです。また、カメラから写真を転送するためのインポーター ツールも含まれています。
水面
Pinta is a free, open source program for drawing and image editing.
DigiKam
Professional Photo Management with the Power of Open Source
ローダーイメージ
Shotwell is a personal photo manager.
フォトコラージュ
PhotoCollage allows you to create photo collage posters.
チョーク
Krita is a FREE and open source painting tool designed for concept artists, illustrators, matte and texture artists, and the VFX industry.
GIMP
GIMP is a cross-platform image editor.