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Travis Build Status Documentation Status Caster is a collection of tools aimed at enabling programming and accessibility entirely by voice built upon the Dragonfly API.

Note for PyPi Users: The PIP package is (Alpha). Do not use the PIP install. Alternatively use this Master Branch with classic install for the best feature experience.

  • Videos by the Caster Community.
  • Instructions for installing
  • Documentation on Caster [ReadTheDocs] and Dragonfly [ReadTheDocs]
  • How to Speak Code - Example Document
  • Caster Command Reference Guides
    • Caster - commands to get started with. Universal navigation and editing - These commands are active all the time, and provide input commands for letters, numbers and punctuation, as well as the ability to easily manipulate windows and text.
      • window right moves the active window to the right-hand side of the screen.
      • prekris inserts a pair of brackets () and moves the cursor inside them.
      • shackle selects the current line.
    • Applications - Application specific control - These commands are only activated when a particular program is the active window, and they provide support for text editors, IDEs, web browsers etc. For example, while the Sublime text editor is the active window, saying
      • find will execute a ctrl-f keystroke, bringing up the find and replace prompt,
      • open file will execute a ctrl-o keystroke,
      • edit next <n> - ctrl-d n times, selecting the next n instances of the currently selected word.
    • Program Languages - Language specific coding - These modules are activated and deactivated with the enable/disable <language> voice command. For example say enable python.
      • for loop which will insert for i in range(0, ):
      • print to console - print()
      • open file - open('filename', 'r') as f:
  • Contributing / How can I help?
  • Do you want to financially support Caster development? Donate at Bountysource
  • Making your own Dragonfly and Caster rules augmented by Development Commands
  • Need support or just curious? Join our community at Join the chat at and Discord for voice chat.
  • The is a curated webpage of information related to voice programming and accessibility. Content Includes: User Tips, Hardware, Videos, Blogs, Repositories, Presentations, and etc. Pull requests welcome!

Feature List

  • Configurable Settings in C:\Users\%USERNAME%\AppData\Local\caster

  • Customize Commands aka Specs and their actions via Simplified Filter Rules and Filter Rules (WIP). Filter Rules code examples can be found in .caster\filters\examples.

  • Compatible Speech Recognition Engines

  • Supported Programming Languages - Enhanced by Caster's Continuous Command Recognition - Demo

    • Python, Java, Bash, C++, C#, Rust, Go, HTML, CSS, JavaScript, SQL, Dart, Latex , Matlab, R, Prolog, VHDL, and Haxe
  • Supported Applications

    • IDEs/Editors: Microsoft Visual C++, Visual Studio, Eclipse, Jetbrains IDEs, Emacs, Sublime, Atom, Visual Studio Code, Notepad++, FlashDevelop, Sql Developer, SQL Server Management Studio
    • Development Tools: Command Prompt, GitBash, KDiff3
    • Statistics: RStudio
    • Word Processor: lyx, Microsoft Word, Typora
    • Browsers: Firefox, Chrome, Internet Explorer
    • Git Client: Github Desktop
    • Chat: Microsoft Teams, Gitter
    • Applications: Foxit Reader, fman, Total Commander, Outlook, Excel
  • Editing and Navigation

  • Utilize Powerful Commands

    • "Alias" Commands - on-the-fly commands created by highlighting stuff
    • "Record From History" - turn previously spoken commands into a voice macro
  • Third-party Integrations

    • Sikulix - Setup: Automates anything you see on the screen of your desktop computer. - Demo
    • Aenea - Setup: A client-server library for using voice macros from Dragon NaturallySpeaking and Dragonfly on remote/non-windows hosts.
    • Autohotkey: A scripting language that allows the automation of various tasks in Windows. Simply install the latest version. If installed, it can speed up some commands by a few seconds - e.g. checking out or updating a pull request from github.
  • Caster extends the Dragonfly API for even more powerful commands.


Dragonfly-Based Voice Programming Toolkit




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