[domysee]

Same for me, and would like to add my own list

1. https://lighthouseapp.io/ - feed reader combined with bookmarking

2. https://lighthouseapp.io/tools/feed-finder - tool to find RSS feeds (https://lighthouseapp.io/blog/deep-dive-finding-rss-feeds)

3. https://lighthouseapp.io/tools/newsletter-to-rss - tool to convert newsletters to RSS feeds

[bluebarbet]

Also: https://kill-the-newsletter.com for use case 3. Free service with no signup that works reliably.