jtibbles

No Frills Gallery is a simple image gallery with optional slideshow feature. There are a number of gallery plug-ins for WordPress, but many 
are either too complex, too rigid or too expensive for some developer’s needs. No Frills Gallery has been developed for simplicity, but also 
for customisation. Thanks to it’s use of shortcodes, which are generated after you have chosen your specific requirements, both the gallery 
and slideshow can be placed anywhere on the site, either in a page or as part of a sidebar, header or any content area via either the standard 
shortcode or PHP’s do_shortcode syntax.
The styling has remained purposefully simple, allowing you the flexibility you need to build on your own style. All front-end stylings can be 
view in the /css/no-frills.css file. While you can edit this directly, it is not advised as it may be replaced on future plug-in updates. 
Instead simply copy the styles inside this css file and add them to your own theme’s style.css file. Then customise them to suit your needs.

No Frills Gallery

A very simple, easily customisable image gallery. Uses shortcodes to display your picture gallery and/or slideshow.

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.

No Frills Gallery vs Simple Pictures Slider