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Website Grader - Grade your website's strengths and weaknesses in seconds.
NewReleases - Stop wasting your time checking manually if some piece of software is updated. Get Email, Slack, Telegram, Discord, Hangouts Chat, Microsoft Teams, Mattermost, Rocket.Chat, or Webhooks notifications.
Checkbot - Checkbot will boost the SEO, speed and security of your site by checking you're following 50+ web best practices. Browser extension with free and paid plans.
ReleaseBell - Stay on top of releases for repos you star on GitHub
PageSpeed Ninja - One-click page speed boost for WordPress
Banditore - Banditore retrieves new releases from your GitHub starred repositories and put them in a RSS feed, just for you.