[Question] Help me recommend effective charities to people who want to donate to specific causes and populations

People on Reddit are asking for charity recommendations in specific cause areas. Here are some examples:

I have a pretty hard time suggesting an effective charity to these people and often just ask them to consider that donations to the most impactful charity might be 100x more impactful than the average charity. I figure that my comments are better than nothing but could be a lot more impactful if I knew a charity within that person’s cause area.

Any suggestions?

Anyone have a list of charities organized by cause area? Even though diabetics and elephants might not be on the list, it could come in handy in case someone asks for a charity on that list.

Some additional context is I created a Reddit bot to find Redditors asking for advice on altruistic careers or best charities, so I can try to steer people towards effective resources (like GiveWell and 80,000 Hours).