You can find the list of all the userscripts I use in the OP of this study log 
I really recommend having a look at it!
The only chart that I made myself (with the help of @araigoshi) is the chart that shows the SRS distribution over time.
The stat scripts are:
- [Userscript] WaniKani Workload Graph
- [Userscript] WaniKani Dashboard SRS and Leech Breakdown
- [Userscript] Total Progress Bar (Allows Level Progress Removal)(aka 2Cool4Progress)
- [Userscript] Progress Percentages
- [Userscript] Wanikani Heatmap
- [Userscript] Levels by SRS
- [Userscript] SRS Distribution Charts
- [Userscript] Overall Progress Bars