There are many tools which will help to find backlinks for off page activity. Some important tools are as follows
1. Google Page Speed Insights
2. Moz local listing score
3. Keyword Tool #1 FREE Alternative To Google Keyword Planner for SEO
4. Google Analytics
5. GWM + BWM
6. GKP
7. Open Site Explorer
8. QuickSprout Website Analyzer
9. Google
10. Google trends
11. Schema Creator
12. Similar Web
13. SERPs Rank Checker
14. Browseo
15. XML Sitemaps