TubeSift - A Game-Changing Tool for YouTube Advertisers - TubeSift enables you to quickly extract extensive lists of highly relevant and popular YouTube videos with monetization enabled and start showing your ads on all of those videos in minutes.
KeywordTool.io - KeywordTool.io is the best FREE alternative to Google Keyword Planner and Ubersuggest. It uses Google's autocomplete feature to get over 750+ long-tail keywords for any given query.
TubeBuddy - The Premier YouTube Channel Management and Optimization Toolkit
Google Trends - Explore Google trending search topics with Google Trends.
Vid Hoarder - Find the perfect YouTube Ad placements in just a few clicks
Keywords Everywhere - Free browser add-on for keyword volume, CPC & competition