ClickMagick is a great tracking tool with a free 14 day trial.
What's unique about it is it's cross-device tracking. You can even track which specific email subscriber had made the sale or conversion if you pass subids to your opt-in forms and email links.
It also now has a Campaigns feature which uses no-redirect tracking using UTM parameters.
It has an extensive knowledge base and you can find tutorials on youtube as well. It's a really powerful tracker.
The only downside is that you're limited to tracking 5 sub-ids when using tracking links and also a few UTM parameters.
They also don't support tracking for sites like popcash, popads and other "bulk traffic sites" so if you're into pop traffic then this isn't for you.