Here are some implementations of the most commonly used data structures :
- Linked Lists
- Stacks
- Queues
- Trees
- Graphs (lectures only, no implementation)
It is written in C.
All these data structures are extremely well explained on mycodeschool's YouTube Channel.
The specific playlist can be found here.
They do an amazing job teaching complex topics in a very understandable way 🏫
I highly recommend it 👍