A dozen years ago, rentacoder was 99.5% people wanting impossible things for $50 but there were some worthwhile "I want a visual basic app that does this clearly defined task and can be created in two days" jobs. (rentacoder got sold and stopped being useful)
https://www.codementor.io/ is another one. Once you sign up, these random tasks pop up. It is a lot of wasted time monitoring them and the quality of jobs can be suspect, much like Fivver, so you've got to screen out bad clients.
A dozen years ago, rentacoder was 99.5% people wanting impossible things for $50 but there were some worthwhile "I want a visual basic app that does this clearly defined task and can be created in two days" jobs. (rentacoder got sold and stopped being useful)