Based on our record, Violentmonkey seems to be a lot more popular than Followup.cc. While we know about 45 links to Violentmonkey, we've tracked only 1 mention of Followup.cc. 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.
I'll update this if I find more. For now, this seems to be a partial solution. It's a Gmail add on (except I don't use Gmail) that adds reminders. The options when setting reminders include cancelling it if someone replies, and to remind everyone in the thread. If you combine those two, it seems like — if you use Gmail's web client and have $23/month you're dying to get rid of — a decent way to add the feature. Source: over 1 year ago
Since Tampermonkey seems to be misbehaving, consider using Violentmonkey. Source: 7 months ago
Step 1Install violentmonkey (or your favorite user script manager). Source: 12 months ago
Sounds like a good violent monkey [0] script for you do this weekend. :) [0] https://violentmonkey.github.io/. - Source: Hacker News / about 1 year ago
Toolbox is great, but if that is all you really need, here's this! You can copy and paste this as a new script to use in ViolentMonkey [AMO] or whatever script manager you use. Source: about 1 year ago
You want a user script extension, use ViolentMonkey for that kind of task. Source: over 1 year ago
Gmelius - Gmelius is the first collaboration platform designed for G Suite and your company's daily tools.
Tampermonkey - Greasemonkey compatible script manager.
FollowUpThen - The simplest way to schedule an email reminder
Greasy Fork - A site for user scripts.
Boomerang for Gmail - Boomerang for Gmail is a Firefox / Chrome plugin that lets you take control of when you send and receive email messages.
Greasemonkey - Customize the way a web page displays or behaves, by using small bits of JavaScript.