Quiver is a notebook designed for programmers. You can easily combine text, code, Markdown, and LaTeX in one note. You can also edit code with an amazing editor, preview Markdown, and instantly find any note via the full-text searching. A note in Quiver consists of cells, snippets, text, Markdown, LaTeX (via MathJax), or diagrams (sequence, flowchart). You can mix and match different types of cells within one note. You can also set different languages for different codes cells. Programmer's notebook should make code editing easy. Quiver includes the ACE code editor in code cells. It supports syntax highlighting for more than 120 languages, more than 20 themes, automatic indent/outdent, and many other features. Quiver allows you to write in Markdown, with inline formatting. Markdown is displayed in a live preview window that displays Markdown as you type. Quiver uses MathJax for typesetting mathematical equations written using LaTeX.