EZosuSlider: Easily Add Aesthetic Sliders to Any Beatmap!
Tutorial
1. Choose the .osu file of the map you want to add sliders in w/ File.
2. Copy the time in the editor using Ctrl+c.
3. Click any button/image of the slider you want to add.
4. In the editor, press Ctrl+L and Enter. Do this BEFORE saving the map.
5. Change the slider velocity until the tail is close to where you want it to end, then snap it by slightly moving the last anchor.
You can sort the sliders by length or complexity, ascending or descending. To add sliders to your favorites, right click on a slider an click "Add to Favorites." To go to favorites, Collections->Favorites. On the favorites screen, you can remove from favorites by right clicking and selecting "Remove from Favorites."