nextiteration

The Style Switcher plugin allows developers to offer clients a set of options for quickly swapping out and viewing different style options, from the front-end WordPress UI. Clients don\’t need to know anything about css or even WordPress admin options.
For example, if you would like to test a few different color options for headers, the plugin will allow you to set appropriate options, and the client can toggle between them, seeing changes live on the page.

Style Switcher

Let clients test simple style changes on the front end, to help make final decisions.

Tom Baumgarten

SPS is a simple plugin to create a slider of pictures and display it with a shortcode or PHP code. Few options to keep it simple, but fast and efficient. Some hooks to improve the slider or to configure it more specifically. Good plugin for developers, with possibility to control what your client can edit or not in the advanced options. 
Compatible with ACF, you can put field groups for every slide. It’s possible to override template files for displaying the fields.

Simple Pictures Slider

A simple plugin to display a picture slider. Light, efficient and compatible with ACF. Best for developers.

Style Switcher vs Simple Pictures Slider