As a student from a country where the native tongue is not English, you will almost certainly be asked by the German university that you apply to, to show some proof of your ability in communicating effectively. If not IELTS, there are other tests that you can take.
TOEFL stands for Test of English as a Foreign Language and is a standardised internationally accepted test of English language ability that is widely accepted by universities and institutions of higher education in Germany. Like the IELTS, TOEFL measures your skills in 4 main sections: Reading, writing, listening and speaking. You are given a score between 0 and 120 with anything above 114 considered as an expert score.
Cambridge English Certificates or Cambridge English Qualifications are test scores that demonstrate your fluency in the English language. Different levels of the exam based on the Common European Framework of Reference (CEFR) assess 4 areas of your language skills including reading, writing, listening and speaking. These tests are globally accepted as prerequisites at more than 25,000 different organisations in the world today. Having a Cambridge English Qualification will increase your opportunities of finding a suitable program of your choice in a university where the primary language of instruction is English.
TOEIC Certificate stands for the Test of English for International Communication. Unlike all other English language assessments, TOEIC specifically focuses on everyday English language skills and fluency of non-native English speakers in intercultural environments and international contexts. This naturally means that there is a greater emphasis on verbal communication abilities. TOEIC has comprehensive exams with tasks that analyse your pronunciation, vocabulary, cohesion, intonation and content.