Tallacman's Cards allows you to choose an image, some text and an internal link to display in this wildly popular format. You can choose just an image if you like. Or just a text block.
This block has button styling for bootstrap and foundation frameworks which is what the majority of themes in the marketplace use. If you find your theme does not style the button correctly, please send me a URL where I can see it being used and I will get the styles for your theme added.