GoCodeo

An agent inside the editor that builds, questions and tests, sold on producing code that is ready rather than illustrative.

Insists on the test step.

What it is sold for

Building and testing features inside the IDE.

The rest of editors and ides, alphabetically. Sharing a category is a filing decision, not a relationship.

Fleet

JetBrains' distributed editor, using the IntelliJ engine but separating the interface from where the code is processed.
IntelliJ IDEA

JetBrains' Java and Kotlin IDE. Its static analysis and refactoring engine set the standard the rest of the field measures against.
Kite

An early completion product that shut down and open-sourced its work. The domain is listed for sale.
MarsCode

ByteDance's cloud IDE with a built-in assistant, supporting a wide language range.
Neovim

A Vim fork with an embedded Lua runtime and a language server protocol client, which made the modern plugin ecosystem possible.
OneCompiler

An online IDE covering seventy languages, useful when the environment matters less than running the snippet.
Sublime Text

A fast native editor, still commercial, whose speed and multiple cursors set expectations everything since has had to meet.
VSCode

The editor that took the market. Free, extensible, and now shipping agent workflows in the box.

ImranTools[GoCodeo]