Sample cause and effect essays are found at Academic Help and The Guide to Grammar and Writing. Academic Help provides a number of samples, rated by other readers, that cover various topics. The Guide to Grammar and Writing has a sample student essay, as well as links to other essays.
Some of the topics covered in the Academic Help essay samples are "Causes of Having a Bad Mood," "What a Lack of Sleep Does to You," and "How Autism Affects One's Life," as of 2016. The sample student essay provided by The Guide to Grammar and Writing is about the reason why soccer has not become a big sport in America. This site has links to other essays, including ones about the effects of economic changes in the United States and the causes of homosexuality.