To make this process easier, there are a lot of programs exist to visually annotate images for machine learning. You can ask a search engine something like "software to annotate images for machine learning" to get a list of them. There are also many online tools that can do all this work. One of the great online tools for this is the Roboflow Annotate. Using this service, you just need to upload your images, draw... - Source: dev.to / 11 months ago

I haven't used their product but looking at their website it looks like they are focused on dataset management and the pipeline around that part of the process (uploading data, understanding the data, labeling data, data curation, model assisted labeling) which is what Roboflow does with https://roboflow.com/annotate. Source: over 1 year ago

We’re happy to sponsor personal and academic projects at Roboflow. Just reach out and we’ll hook you up: https://roboflow.com/annotate. Source: almost 3 years ago

I've used the Timy (https://timy.website/) free tier for this in the past. The one feature that was missing though was to schedule messages to be sent at a certain time in the recipient's timezone. Unfortunately it looks like MessageThemLater doesn't support that feature either. - Source: Hacker News / about 3 years ago