To round up the Mares of Diomedes
These wild horses feasted on human flesh. They were led by Diomedes. To defeat them Heracles killed Diomedes then fed him to the horses. Once full they were calm and he got them under control
Heracles' 9th trial was to fetch the belt of Hippolyte. Hippolye was the queen of the Amazons, a tribe of warrior women. She happily obliged to give Heracles her belt, but Hera had to make it difficult. Hera made the amazons think that Heracles was hurting their queen so they attacked and he had to fight their whole army to get the belt.
Fetching the Cattle of Geryon
These cattle lived on an island far west gaurded by Orthrus, which is a two headed dog and Geryon, a heardsman who had three bodies above the waist. Heracles solved this by killing them both and driving the cattle home.
The golden apples of the Hesperides
The golden apples belonged to Hera. They were kept by the Hesperides, the daughters of the titan Atlas. Heracles did not know where the apples were kept so he went to their father. Atlas supported the weight of the earth on his shoulders. Atlas said he would go retrieve the apples for Heracles himself if he took his place for a while. Heracles agreed on Atlas set off. Atlas returned with the apples, but had enjoyed his time away so much that he refused to to take his burden back. Atlas said he would take the apples back to Eurystheus himself. Thinking quickly, Heracles pretended to agree to take the burden but asked Atlas to take the weight for a moment so he could settle it more comfortably. Atlas did, and Heracles escaped.
Bringing Cerberus from Tartarus
Cerberus, a monster out three headed dog gaurded the gates of the underworld. He prevented anyone from leaving the underworld. Pluto gave Heracles permission to take the dog if he did not use weapons. Heracles had to drag the struggling dog all the way to the court of Eurystheus.
Other Adventures of Heracles
Heracles had many other adventures. On one journey he killed the eagles that tormented Prometheus and freed the titan. Heracles also sailed with the Argonauts and freed his cousin Theseus from his chains in the Underworld. He still suffered fits of madness caused by Hera, until he was finally cured by the witch, Medea.
The death of Heracles
Heracles later married Deianeira and had multiple children with her. Hera finally caught up with him. She tricked Deianeira into giving Heracles a magic robe. She told her that the rob would keep Heracles faithful to her. With this thought in her mind she gave him the robe. It turned out that the robe was poisoned and caused great agony when worn. He was unable to remove the rob thus killing him. He then had a funeral pyre built and climbed it to die and escape the pain. Zeus then came and snatched his son from the fires and took him to mount Olympus where he then became immortal.