Utilities & Online Tools

Open-source computer algebra with familiar expression syntax

Network statistics in an interactive terminal or script output

Mathematical and scientific calculators with practical forms

Radio and circuit calculations for component design

FTP and SFTP file access on iPhone and iPad

Civil and structural calculation tools in one collection

Exchange files over a shared local wireless connection

Capture packets and diagnose wired or wireless network behavior

Create PDFs from printable documents and add editing tools

Measure several network-performance dimensions with one tool

GNU's collection of common network clients and diagnostic commands

A community-maintained successor to Firefox Send for self-hosting

Collaborative PDF editing and fillable forms

Orchestrate business file flows across connected systems

Electronics formulas from components to power supplies

Calculators for work, study and household questions

Browse servers and cloud storage from one desktop client

Scientific arithmetic, graphs and algebra tools for Windows

Compare compressed image copies in real time

Present and update creative-file deliveries without replacing the link

Convert and repair text-based subtitle files

Personal peer-to-peer synchronization and direct file sending

Internet speed testing with mobile coverage resources

Compare domain answers across public DNS resolvers