RPG Maker MV uses plugins, not scripts as RMXP, VX and VXA do.
The Currency Formatter plugin rewrites the currency into a much more readable format, especially with larger numbers, thus 1000 is shown as 1,000 or 1k, 100000 is shown as 100,000 or 100k, or 1000000 becomes 1,000,000 or 1m, etc.
The Extra Message Codes plugin provides a few extra control characters for message windows, including areas for player names, gender, text and battles.
The Randomize Title/Loading/Game Over Images plugin displays random Title Screen, Game Over and Loading screen images. This plugin originally comprised three separate plugins that merged into one, as it made more sense to do so.
The Map/Compass HUD plugin displays a window on the map showing the map name, compass/direction and player coordinates, each of which can be toggled on or off.
The Random Loading… Images plugin enables you to add more "Loading…" images and randomize them so that whenever RMMV preloads its resources the default image will be replaced with a random one.
The Social Media Buttons Plugin enables you to display social media buttons (Twitter, Facebook, Google+, YouTube, Pinterest, and your project Website) on the Title Screen, each of which opens the corresponding website in a new window. You can also use the plugin to send players to a website in-game via events with a simple Plugin Command.
The Title Screen Add-On plugin adds several features to the Title Screen (as the name suggests). This plugin contains a number of "pluginlets", including my Pretitle Movie Plugin (no longer available), which I wrote when RMMV was first released. I combined them into a single add-on to make it easier to maintain and update.
The Windowskin Tool Plugin enables you to tweak certain windowskin settings, such as changing the default windowskin from within the Plugin Manager. Also, RMMV has the same transparency problem with windowskins as RMVX did in that the windowskin colour (in the Database) overrides the windowskin graphic (which is a simple hack really).