Write & Improve is a great tool for English language learners who want to practise their writing and composition skills. It offers a lot of topics to work on autonomously and to submit for instant automatic grading and feedback.  The topics are organised in three workbooks/levels: beginner, intermediate and advanced. One can even create her own tasks based on her particular needs and submit it for correction. This tool checks grammar, spelling and vocabulary. It also shows the parts of your writing that need improvement. in addition, you can submit your writing after improvement as many times as needed and  you also view and monitor your progress through graphs.