Simplilearn - Simplilearn offers online certification training courses for professionals.
Codility - Codility provides a SaaS platform with advanced validation, security and protection features to evaluate the skills of software engineers.
AWS Certified Solutions Arch. - AWS Certified Solutions Arch App allows you to access an extensive collection of more than 320 exam questions so you can prepare yourself for AWS exams.
LinkedIn Learning - Online training through LinkedIn's professional network.
CISSP Pocket Prep - CISSP Pocket Prep app is a digital exam simulator through which users can create customizable practice tests with a detailed explanation of the answer to each question so they can immediately view results.
Frontend Masters - Frontend Masters offers frontend engineering courses.