HackerRank - HackerRank is a platform that allows companies to conduct interviews remotely to hire developers and for technical assessment purposes.
Numi App - Numi is a beautiful text calculator for Mac.
AlgoExpert.io - A better way to prep for tech interviews
SpeedCrunch - SpeedCrunch. SpeedCrunch is a high-precision scientific calculator featuring a fast, keyboard-driven user interface. It is free and open-source software, licensed under the GPL. Download Documentation Donate .
Codility - Codility provides a SaaS platform with advanced validation, security and protection features to evaluate the skills of software engineers.
Qalculate! - Qalculate! is a multiplatform multi-purpose desktop calculator.