Tools
Science
Computer
- IPIP: The best IP geolocation database
Programming
Python
- strftime: Python strftime reference
- ruff: An extremely fast Python linter and code formatter, written in Rust.
Document
- Convertio: Convert your files to any formats (300+ formats supported)
- WebPlotDigitizer: Web based tool to extract data from plots, images, and maps
PDF
- cpdf: Command line tool to manipulate existing PDF files
- ILovePDF: Every tool you need to work with PDFs in one place
- pdftk: The PDF toolkit for doing everyday things with PDF documents
- PDF2JPG: Free PDF to JPG online converter
- Smallpdf: All-in-one easy-to-use online PDF tools
Image
- ILoveIMG: Every tool you could want to edit images in bulk
- Logoly: A simple online logo generator
- Squoosh: Image compression web app provided by Google
Writing