Sider is a general-purpose AI productivity assistant that works in your web browser and on your phone. It's got chat integration with multiple GPT models, AI reading tools and image editing. With tools like text-to-image generation and image upscaling, Sider can perform a lot of automated tasks to get you to where you want to go faster. It's got a free version and a Pro subscription for $20/month.
Another good option is Merlin, an all-purpose AI chat tool that can help you with lots of tasks on any website. It's got chat with 20+ AI models, document summarization, email drafting and social media post creation. Merlin is a free Chrome extension and web app, with a free plan that lets you make 102 queries per day, and paid plans that let you make unlimited queries and offer other features.
Voilà is another good option, an AI-powered browser assistant that gives you direct access to ChatGPT abilities. It's got tools for content generation, email drafting and research, so it's good for collaborative work. Voilà is focused on privacy and has a variety of pricing options, including a free plan and premium options starting at $8/month.