I tried many other tools and found Linkly the best so far.
I like the following features.

1. Its easy to start link building
2. I could segregate my links among free, paid, exchange or even guest post.
3. Filter option to get results is a bonus for me.
4. There are so many features like, relevance, DA, AHrefs, Category/Niche, (+SECONDARY CATEGORY/NICHE), Spam rating, language, country, link type, page views and more!
5. I could cut short a lot of my time to build a good Backlink.
6. Shared workspace, Link monitor are a good features i would use extensively.
7. I might plan to turn into a Full time agency soon with all the features on my table.
8. A-B-C Link Exchange, Free Guest Blog (Give Content, Get link), Paid Guest Blog & Link Insertion are great features i like a lot.
9. Link types could be content, image, author byline, profile page and even references.
10. Its a great time saver for me especially as in a single account i could manage Low/Mid/High DA Sites