OpenRefine (https://openrefine.org/) is a tool for data cleaning and wrangling. You can check the OpenRefine for Social Science Data tutorial on Data Carpentry.
Messydates is an R package developed by Professor James Hollway at the Global Governance Centre to tidy up dates in your data files so they are compatible with other R packages.
Pandas is the most widely-used Python tool for data wrangling and analysis.
Offline LLM/AI tools for transcription of sensitive data (require a powerful PC)
Online LLM/AI tools for interview transcription (more expensive and should not be used with sensitive data)
Tool for handwritten archives transcription