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Focused browser calculators for statistical questions

Focused statistics tools for research calculations

RF and microwave calculations with formula references

Component calculations for practical electronics

Audio, acoustics and electrical calculation references

Fluid-flow calculators for pipes, valves and measurements

Molecular masses, formulas and isotope distributions

Laboratory calculations beside molecular-biology utilities

Weather quantities with linked formulas

A focused math solver with examples and reference links

Import a manuscript and compile several ebook formats

Validate and convert coded measurement-unit expressions

Combine media transcoding with automated quality-control workflows

Convert subtitle batches while checking text and timing

Inspect public IP and approximate geolocation data

Explain IPv4 subnets through address ranges and binary values

Online PDF editing with page-layout and archive tools

Open-source validation for PDF/A and PDF/UA

PDF tagging, manual repair, and built-in validation

Count characters in short text

Monitor word counts and repeated keywords

Combine a resume and portfolio with a more directed job search

Look up a flight or investigate airport activity

Compare rental suppliers while checking deposits and fuel terms