Ankle anatomy:
Lateral ankle ligaments: anterior talofibular ligament, posterior talofibular ligament, calcaneofibular ligament
Medial ankle ligament: deltoid ligament
Tibiofibular ligaments/syndesmosis: anterior tibiofibular ligament, posterior tibiofibular ligament, interosseous membrane
Posterior lower leg muscles: gastrocnemius, soleus, plantaris


Images:
Ankle bone: tibia, fibula, talus (sandwiched btw tibia & calcaneus), calcaneus (heel)

1 Anterior talofibular ligament; 2 anterior tibiofibular ligament;

3 anterior tibiofibular ligament

Lower leg muscles:



Video:

Sources:
Pictorial essay of ankle anatomy: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2855022/