Gatsby Plugins i usually use

gatsby-plugin-emotion  #https://www.gatsbyjs.org/packages/gatsby-plugin-emotion/  #for styled components
gatsby-plugin-sharp   #https://www.gatsbyjs.org/packages/gatsby-plugin-sharp/   #Exposes several image processing functions 
gatsby-transformer-sharp #https://www.gatsbyjs.org/packages/gatsby-transformer-sharp/?=gatsby%20transformer  #Creates ImageSharp nodes from image types that are supported by the Sharp image processing library
gatsby-plugin-typography #https://www.gatsbyjs.org/packages/gatsby-plugin-typography/?=gatsby-plugin-typography #for typography
typography-theme-fairy-gates #https://github.com/KyleAMathews/typography.js/tree/master/packages/typography-theme-fairy-gates  #typo library
gatsby-source-filesystem #https://www.gatsbyjs.org/packages/gatsby-source-filesystem/?=`gatsby-source-filesystem` #to get data about files