If you're looking for a replacement for Dreamspace, Prompt Studio is a good candidate. It's an environment for building and testing Large Language Models (LLMs) that includes a collaborative text editor for constructing and linking prompts. It also offers customizable templates, AI completion tools, and a managed AI backend for deployment. It's geared for teams that want to automate tasks and build AI into their existing processes.
Another option is PROMPTMETHEUS, which provides a full-fledged platform for writing, testing and deploying one-shot prompts to more than 80 LLMs. It includes a prompt toolbox, model selection, performance testing and deployment to custom endpoints. The platform also integrates with third-party services like Notion, Zapier and Airtable, so it's a good choice for people who need to manage and optimize their AI prompts.
You could also look at Airtrain AI, a no-code compute platform geared for data teams that need to process large data pipelines. It's geared more toward data processing, but it also has an LLM Playground for testing different models and fine tuning them for your needs. It could be useful if you need a way to quickly test and deploy custom AI models.
Finally, TheB.AI gives you access to a variety of AI models, including large language models like ChatGPT and other special purpose models. You can search in real time, customize models and generate images from text prompts. It's good if you need to use multiple AI models in your workflow or build your own custom apps.