Logtime - Diary, tasks and goals. All-in-one productivity solution.
PhotoStudy - Stuck on a Math or Science Problem? Get Help From an Expert Tutor in Seconds!
Bitbounce - Charge unsolicited email senders a cryptocurrency fee
Math.com - Math.
SerpClix - SerpClix is a click exchange network used to send more real clicks to your Google SERP. You can click to earn money or buy clicks to rank higher on Google.
Mathway - Mathway is a freemium math solving app that helps you find the solutions to any math problem you can imagine.