Maintenance is also a very good WordPress maintenance plugin developed by fruitfulcode. It is available in both free and paid version. You can also download it for free from WordPress repository. It is a highly customizable plugin and looks great on any device due to its responsive layout. In this you can customize color, logo, background image, text etc. With its pro version you can get even more features.
Features
Fullscreen background
Blur background effect
You can upload your own logo
Configurable colors: fonts, icons, background
You can add your title, headline, text
Features
Fullscreen background
Blur background effect
You can upload your own logo
Configurable colors: fonts, icons, background
You can add your title, headline, text