I got refused from an SPP college of Canada. Should I apply for a non-SPP college?

No, the IELTS is not a mandatory requirement for admission the German universities. However, if you are applying for English taught courses in Germany, proving the English proficiency is mandatory, for which you can prove it through any English test like, TOEFL, PTE other than IELTS. 

Yes, international students are required to submit TOEFL / IELTS score for admission to Fisher College USA. Apart from these test scores, PTE and Duolingo test scores can also be submitted. The minimum test scores that are required are:

Leiden University expects a minimum score of 6.5 or above in IELTS. Along with this, international applicants whose first language is not English must demonstrate their English language proficiency. The university recommends students to achieve the following minimum scores in any one of the English exams:

To gain admission to Purdue University,  it is important to prove English proficiency as Purdue courses are offered in English only. Below is the table showing different ELP Tests and the minimum scores required for the same: 

The minimum IELTS test score requirement varies for different courses & level of studies. However, the general IELTS (Academic) test score requirement is 6.5.

Moreover, the institute also accepts TOEFL, Pearson Test of English (PTE) & C1 Advanced as valid proof of English language proficiency.