All tools are best for PPC. Although every tool has its own unique selling point for the type of Advertising Strategy.
Audience Targeting: Double-click by Cookie targeting, Facebook Audience Interest, etc
Search Targeting: Google Adwords, Bing Adwords, etc.
App Targeting: Ad mob etc.
Video Targeting: Youtube Ads.
Although these are common tools, there are many Data Management Platforms that provide the data in real-time.
Bluekai, Data logix, Exalate, lotame etc.
There are so many exchanges that also sell the inventory to these tools.
Facebook Power Editor: With an online Facebook interface it’s not possible to set up all campaigns like Dark Post, Instagram ads, etc. Power editor is best for making offline changes in campaigns and setting up new campaigns easily.
Bing Ads Intelligence: The best tool to analyze the best potential keywords and provide demographic data in excel.
Uber Suggest: Keyword planner is one of the popular tools for analyzing keywords along with search volume and competition. Uber suggest is also the best tool for keyword analysis.