Vircadia
Second Life
VRChat
Facebook Spaces
Hubs by Mozilla
OpenSimulator
Sansar
vTime XR
ForthWrite
ReclaimAI
Superhuman
Shortwave
Serif AI
Gemini
Gmail
LIAM
ForthWrite is an AI email writing assistant for Gmail and Outlook that learns your writing style from your real sent mail. The more you use it, the more it sounds like you. Get smart drafts in seconds, auto-draft replies before you open your inbox, and maintain your personal voice at scale. Free to start, no credit card required. Works inside Gmail and Outlook on the web.
How it works
ForthWrite captures your tone, sentence rhythm, and sign-offs from your actual sent emails, then uses that profile to generate drafts that match how you write, not a generic AI voice. Every draft you edit or send improves the model over time.
Key features
Who uses it
Professionals who send high volumes of relationship-critical email: lawyers, financial advisors, recruiters, account executives, founders, and anyone who wants their inbox handled without sounding like a chatbot wrote it.
Pricing
Free tier includes 10 drafts per week with no credit card required. Paid plans start at $12/month and include unlimited drafts, custom persona prompts, and auto-draft.
Vircadia ForthWriteForthWrite's answer:
Next.js, React, Supabase, Anthropic Claude, OpenAI, Stripe, Vercel, Chrome Extensions API
ForthWrite's answer:
ForthWrite learns your writing style from your actual sent mail, not a generic prompt. Every draft sounds like you wrote it because it was trained on how you actually write. It also auto-drafts replies before you open your inbox, so your email is partially handled before your day starts.
ForthWrite's answer:
Most AI email tools give you a blank box and a "write for me" button. ForthWrite builds a voice profile from your sent history and gets more accurate with every draft you edit or send. Unlike ChatGPT or Gemini, it works natively inside Gmail and Outlook with no copy-paste. Unlike Lavender, it writes the draft, not just scores it.
ForthWrite's answer:
Professionals who send high volumes of relationship-critical email and cannot afford to sound generic: lawyers, financial advisors, recruiters, account executives, consultants, and founders managing their own inbox.
ForthWrite's answer:
Built out of frustration with AI writing tools that produce text that sounds nothing like the person sending it, and as a way to handle large amounts of daily email. The core insight was that your sent mail is the best training data you already have, and no tool was using it.
Most of the 3D world experiences limit what a user can build and do. This is not so with Vircadia. The Apache license makes this 3D application the most flexible tool for building custom and interactive worlds. Vircadia is truly free, open and relatively easy to use. There are several developers who are working and improving this platform daily! Free content ensures that new users have access to materials for building their world without having to worry about learning difficult 3D applications. I highly recommend Vircadia and believe this will be the next big server technology on the world wide web.
Probably the best open-source metaverse
I built ForthWrite because I kept sending emails that sounded like they came from the same generic AI as everyone else. After launching it, I still use it for my own inbox every day, which is about the most honest endorsement I can give.
The Chrome extension lives inside Gmail and Outlook on the web. Open a thread, hit Alt+Shift+D, and a draft comes back in your voice, not a template. The free tier is real: 10 drafts per week, no API key, no credit card. Voice matching is included on free, because that is the point.
What keeps it useful compared to Gemini or a chat tab: it learns from what you actually send. Every edit you make before hitting send becomes a signal. Over time the drafts drift closer to how you really write, and the dashboard shows the improvement curve so you can see it happening.
The web compose surface lets you draft from forthwrite.ai without installing anything, useful for people who want to try before committing to the extension.
Standard adds recipient-aware and intent-aware drafting plus AI coaching. Pro adds auto-draft (replies waiting when you open Gmail), batch replies, and Prompt Lab for version-controlling your prompts. Teams adds a shared persona and seat-level analytics.
ForthWrite is not for everyone. If you just need quick replies and tone does not matter, Gemini is free and already in your inbox. ForthWrite is for people where tone does matter: client communication, relationship-driven threads, external correspondence where sounding off costs something real.
Disclosure: I am the founder and use it daily. Happy to answer questions in the comments.
Based on our record, Vircadia seems to be more popular. It has been mentiond 19 times since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
Vircadia is an open source (Apache 2.0) metaverse ecosystem consisting of a high performance real-time server architecture (C++), web SDK (TS), and web client (TS). Source: over 2 years ago
Not pre-baked. I work on https://vircadia.com/ -- it has to give every user their own audio mix to account for their 3D position. This means codec costs add up fast. You can't just encode once and stream the same thing to a dozen people. - Source: Hacker News / over 4 years ago
Both, primarily the first. Low latency is definitely a requirement, but no issues with Opus on that account. > I haven't looked into how expensive it is to encode in terms of CPU time, so I assume maybe you're taking about a bottleneck in terms of the number of simultaneous streams you can support on a single CPU? Yup! I work on https://vircadia.com/ -- we have to compress audio in real time and every user gets... - Source: Hacker News / over 4 years ago
Second Life improved avatars by quite a lot in fairly recent times. There's also alternatives to it, eg, check out the project I work on: https://vircadia.com/ It's a sort of spiritual successor to Second Life, since it was started by the same guy -- Philip Rosedale -- after he left SL. It didn't quite work, so the commercial project died and got picked up by open source forks, which is what I work on. It's less... - Source: Hacker News / over 4 years ago
To me it's useful/entertaining in the ways forums and chats are, plus some additional features on top of that. Eg, you can talk to people, but in addition to that you have a collaborative 3D environment with positional audio where you can script, make games or do other stuff. Recently a group using our project put up a Christmas Carol VR play, and the results were most impressive. https://vircadia.com/ -- it's an... - Source: Hacker News / over 4 years ago
Second Life - Second Life is a virtual reality platform where individuals interact in a virtual world. The software was developed in 2003 by Linden Labs. More than one million people now regularly use the software.
ReclaimAI - Helps users prioritize their work and personal calendars
VRChat - Create and play in virtual worlds with others
Superhuman - Superhuman is an email management tool.
Facebook Spaces - Facebook's social Virtual Reality platform is here!
Shortwave - Email smarter & faster with a reinvented experience for your Gmail