Yoga pose photos used in the Gymography app. Free licences from Wikimedia Commons.

adho_mukha_svanasana.jpg: Iveto, CC BY 3.0, https://commons.wikimedia.org/wiki/File:Downward-Facing-Dog.JPG
anulom_vilom.jpg: Pinkpanther0, CC BY 4.0, https://commons.wikimedia.org/wiki/File:Yoga_instructor_practising_Pranayama.jpg
ardha_matsyendrasana.jpg: lululemon athletica, CC BY 2.0, https://commons.wikimedia.org/wiki/File:Ardha_Matyendrasana_-_Half_Lord_of_the_Fishes_Pose_-_Bound_Arm_Variation.jpg
ashtanga_namaskara.jpg: Joseph RENGER, CC BY-SA 3.0, https://commons.wikimedia.org/wiki/File:6Ashtanga_Namaskara.JPG
bhujangasana.jpg: Sezam777, CC BY-SA 4.0, https://commons.wikimedia.org/wiki/File:Bhujangasana_zamkovoi.jpg
dhanurasana.jpg: Joseph RENGER, CC BY-SA 3.0, https://commons.wikimedia.org/wiki/File:Dhanurasana.jpg
natarajasana.jpg: Jfbongarçon, CC BY-SA 3.0, https://commons.wikimedia.org/wiki/File:Natarajasana-yoga-posture-dancer.jpg
navasana.jpg: Joseph RENGER, CC BY-SA 3.0, https://commons.wikimedia.org/wiki/File:Navasana.jpg
parsvakonasana.jpg: lululemon athletica, CC BY 2.0, https://commons.wikimedia.org/wiki/File:Parsvakonasana_Utthita_B_-_Revolved_Side_Angle_Pose_B_-_with_arm_Support.jpg
pranamasana.jpg: Joseph RENGER, CC BY-SA 3.0, https://commons.wikimedia.org/wiki/File:1Pranamasana.JPG
prasarita.jpg: LYUbdevanshi77, CC0, https://commons.wikimedia.org/wiki/File:Devanshi_Chatrasan.jpg
sukhasana.jpg: Joseph RENGER, CC BY-SA 3.0, https://commons.wikimedia.org/wiki/File:Sukkasana.jpg
trikonasana.jpg: Kennguru, CC BY 3.0, https://commons.wikimedia.org/wiki/File:Trikonasana_Yoga-Asana_Nina-Mel.jpg
ustrasana.jpg: lululemon athletica, CC BY 2.0, https://commons.wikimedia.org/wiki/File:Ustrasana_-_Camel_Pose.jpg
vajrasana.jpg: Joseph RENGER, CC BY-SA 3.0, https://commons.wikimedia.org/wiki/File:Vajrasana.jpg
viparita_karani.jpg: Satheesan.vn, CC BY-SA 3.0, https://commons.wikimedia.org/wiki/File:Balancing_bear-posture.jpg
virabhadrasana1.jpg: Lilianwhite, CC BY 4.0, https://commons.wikimedia.org/wiki/File:Rocket-yoga-01-1200px.jpg
virabhadrasana2.jpg: lululemon athletica, CC BY 2.0, https://commons.wikimedia.org/wiki/File:Yoga_Warrior_I.jpg
vrikshasana.jpg: Kennguru, CC BY 3.0, https://commons.wikimedia.org/wiki/File:Vriksasana_Yoga-Asana_Nina-Mel.jpg