[update] adds markdownlint, markdown-spellcheck, Weallbehave

README.md

@@ -12,11 +12,14 @@
 - **[Grammarly](https://www.grammarly.com/):** Grammarly makes sure everything you type is clear and mistake-free. It even checks for plagiarism.
 - **[The Hemingway Editor](http://www.hemingwayapp.com/):** Hemingway helps you write with power and clarity by highlighting adverbs, passive voice, and dull, complicated words. Cut the dead weight from your writing.
 - **[JigSaw](https://jigsaw.google.com/projects/):** A technology incubator focused on countering extremism and removing censorship online.
+- **[Markdownlint](https://github.com/markdownlint/markdownlint):** A tool to check markdown files and flag style issues.
+  - **[Markdownlint-cli](https://github.com/igorshubovych/markdownlint-cli):** Provides a command line interface for MarkdownLint.
 - **[Perspective API](https://www.perspectiveapi.com/#/):** An API that uses machine learning models to score the perceived impact of comments before they are sent. There is a demo nearer to the bottom of the page which can be used to try out the API.
 - **[Prompts](http://getprompts.com/):** Prompts makes suggestions for what you should write next.
 - **[ProWritingAid](https://prowritingaid.com/):** ProWritingAid suggests edits for repetitiveness, vague wording, sentence length variation, over-dependence on adverbs, passive voice, over-complicated sentence constructions, spelling, and grammar.
 - **[Readable.io](https://readable.io/):** Readable.io analyzes the readability of text and suggests ways to improve it.
 - **[Taskade](https://taskade.com/):** Taskade is a real-time collaborative editor for creating bullet lists, outlines, and task lists.
+- **[Weallbehave](https://github.com/wealljs/weallbehave):** Weallbehave is a command-line tool for automatically generating and updating the `CODE_OF_CONDUCT.md` for your projects.
 - **[Write Good](https://github.com/btford/write-good):**  Write Good is a tool for improving language that can be run again code in a shell or within text editors via test editor plugins.
 
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