ETS

ETS is a software application which helps people test and improve their English grammar, vocabulary and pronunciation skills, by providing you with several tests of different levels.
The interface resembles to some extent the design of a typical web browser, which means that both experienced users and beginners can get around it easily, without encountering difficulties. It consists of a few buttons (“Home,” “Quit,” “Grammar Tests” etc.) and a panel which displays the test you are taking.
When it comes to grammar, this utility contains a wide range of exams, for different levels of knowledge, such as elementary, pre-intermediate and advanced. Aside from that, there are 80 questions about words, 110 tenses and idioms tests.
You can also take advantage of their 220 TEOFL iBT vocabulary questions, so as to broaden your horizons and prepare for the actual exam. “Animals name by Pictures” easy, medium and hard tests are available. Each type contains 200 questions and also encloses pronunciation, so that you can also practice this.
Finally, it encompasses a list of other free software, similar to ETS, which can be downloaded and used.
Help contents are not provided, yet seeing how easy to use this software program is, it becomes apparent that they are not actually required. Furthermore, it is quite friendly to your system's resources, as CPU and memory usage is low. This means you can easily run it alongside other apps, without experiencing problems of any kind.
Taking all of this into consideration, we can safely say ETS is a useful piece of software, especially for people interested in improving their knowledge of the English language.