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Scientific calculation with expression history

Embed Perl-compatible regular-expression matching in applications through a portable C library.

A Windows editor for source and text files with configurable syntax highlighting and Perl- or JavaScript-style regular expressions.

A Windows source-file editor with syntax highlighting, code folding, portable downloads and text-format tools.

A beginner-focused Python IDE that makes variables and program execution visible while you learn.

Edit, run and share short Kotlin examples in a browser without first creating a full project.

Edit plain-text and source files on macOS with syntax highlighting, encoding tools, scripting, and regex search.

A Windows text and code editor with CSV tools, search, and support for very large files.

Change and animate facial expressions, poses, and gestures in photos with AI.

AI chat platform for anime characters with visual expressions

AI workspace for editing photos and making short videos in a browser

Algebra entry with solving, factoring and graphing modes

Custom-domain alias routing with adjustable logging controls

Display and export a regex diagram

Arbitrary-precision arithmetic that keeps track of units

Graph equations, inspect points and evaluate functions

Open-source computer algebra with familiar expression syntax

Curated zebrafish genes, expression and research information

British and world history on HistoryExtra

Campaigns, conflict history and military-history books

Search shell history with command context, and optionally sync it across machines with encryption.

Rewrite Git history to remove paths, extract directories or apply custom filters.

Transform and inspect CSV, TSV, JSON, and other structured text from the command line.

Edit code on iPhone or iPad with broad syntax highlighting, remote file access, and an SSH terminal.