I created a Prezi that includes the basics of the necessities of an essay: an introduction, body paragraphs, and concluding paragraph, with bullet points of what to look for in each paragraph. I also added a section for what to look for when revising and editing an essay. This would be good to use to introduce to students how to compose a good essay. After going over this as a class, you could post the link on a class webpage, and have students use it each time they are creating an essay. While it would not necessarily replace a rubric, it would give students a general idea of what you would be looking for and serve as a checklist for them.
When you purchase this product, you will be prompted to download a Microsoft Word file, which will give you access to the link.