This is the VS Code client for TabNine, the all-language autocompleter.
Many users choose to disable the default behavior of using Enter to accept completions, to avoid accepting a completion when they intended to start a new line. You can do this by going to Settings → Editor: Accept Suggestion On Enter and setting it to off.
A note on licensing: this repo includes source code as well as packaged TabNine binaries. The MIT license only applies to the source code, not the binaries. The binaries are covered by the TabNine End User License Agreement.