Three bulbs that produce showy flowers that appear in my garden when the rains return in the fall are spider lilies (Lycoris radiata), magic lily (Lycoris squamigera), and oxblood lilies (Rhodophiala bifida). The most common spider lilies are red, however if you search you may also find them in white, yellow, peach and pink. Magic lily is the tallest with good sized clusters of pink trumpet shaped flowers. Oxblood lilies can be planted to create a spectacular swath of red.
Not only do these bulbs produce beautiful flowers but they are really easy to care for. As long as they are not being overwatered, they will come back for you year after year without needing you to do anything else to them after setting them in place. (In fact, mine never get any supplemental watering in my north Texas garden.)
If you know someone with a large clump of one of these bulbs and if they would be willing to share, you can divide them in the spring. You can find info on how to do this in a previous blog post.