SEMrush is hands down the best tool for keyword research. I love that you can do competitor analysis and find the keywords people are searching to go to your competitor's site. You can add all your projects in one big dashboard and see a quick overview of your keyword rankings (I do this every other day to check if my sites were penalized/keywords dropped). The reporting feature is also a great alternative to Google Analytics and we send automated reports to our clients.
Quick tip: While doing keyword research with SEMrush, do not select the keywords with search volume more than 1000 per month, as they require a lot of efforts to get required traffic for your site. Choose the keywords between 500 to 1000 per month search volume (or even below) so you can get top 3 or at least first page rankings even if you’ve a new website.
The tool also helps you discover and follow the hottest topics in your niche via the nifty hashtag reports. You can see which hashtags are making posts more engaging and take a peek at what your competitors are doing. Plus, it allows you to see who has mentioned you, your brand or products with a comprehensive “Mentions” report. The report also helps you discover PR opportunities.