Software

1. Simons Foundation site

Tools

1. Latex table generator site
2. online slope field solver site
3. matrix calculator site

Interesting sites

1. Many math Counter Examples site
2. Symplectic Structures in Physics site
3. Mathematical 3D print site
4. Data visualizer site

Blogs

1. Advice from Terry Tao site
2. Category and language blog
3. Discrete Geometry - Keenan Crane site

Others

1. Guitar Arpeggio Library site
2. Shogi Learning Youtube HIDETCHI Ayumu
3. Stratz data visualization https://stratz.com/welcome