sevy29

This plugin let you choice a date range to publish your Posts or Custom Types

wp date range

maxman1850

Want to add a range slider to your Gravityforms forms? This plugin adds a simpler range slider to the Gravityforms plugin, edit your slider by selecting a minimum or maximum value and select the desired steps.
The Slider field is available under ‘Advanced Fields’

Simple Range Slider for Gravityforms

Does what it says, future updates can make it a great one. 

Simple plugin

Adds a simple range slider to the Gravityforms plugin. Allows users to select a minimum, maximum and steps to the slider.

wp date range vs Simple Range Slider for Gravityforms