Mockuuups Studio - Fast and easy way to create product mockups on macOS, Windows and Linux.
Honeygain - Time flies when you’re making sweet money. Simply download the app, turn it on, and earn!
Mediamodifier - Create beautiful designs and product mockups in seconds.
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.
mockDrop - Is a webapp for creating free device mockups including your screenshots.
21 Lists - Send and receive targeted, paid microtasks