Question: I'm looking for a tool that can help me craft engaging emails with varying tone and length options.

If you're looking for a tool to help you write emails with different tones and lengths, AImReply is a good option. This AI email writer can generate high-quality, personalized emails in a variety of tones and lengths, making it good for everyday communication, email marketing, customer service and more. It offers free, unlimited use, multilingual support and a premium subscription for more features.

Another good option is the AI Email Writer, which is based on the GPT-3 language model. It uses ChatGPT-powered templates to generate professional emails with a variety of tone options, from casual to formal, and different word count and emotional tone options. It's good for anyone who needs to write emails that are persuasive and engaging but doesn't have hours of time.

MailGenerator.ai also offers a powerful option with its AI email generator. You can generate personalized and persuasive emails quickly, with options to adjust tone, language, length and audience based on your prompts. It's good for a variety of business uses, including email marketing and sales, and works in multiple languages and on multiple devices.

If you want something more integrated into your workflow, check out Mailr, an AI email assistant that's available as a Chrome extension. It's got features like Instant Drafting, Custom Tones and Word Limit options to help you save hours of work each day. Mailr offers a free tier and a premium subscription for more features.