OpenRefine is a free data wrangling tool that can be used to clean tabular data and connect it with knowledge bases, including Wikidata. It was previously developed by Google (under the name Google Refine) and has now transitioned to a community-supported project.
This page gathers OpenRefine recipes that can be useful to import datasets into Wikidata, or augment datasets with additional data extracted from Wikidata. Feel free to use the talk page to ask for help with the software. If you enjoy using this tool, you can spread the word with the {{User loves OpenRefine}} userbox.