Cheat sheets for developers

The index of every curated awesome list, covering nearly every language, framework and topic in software. When you are starting in an unfamiliar area, finding its awesome list first will usually save you a week of searching.

A very large, actively maintained index of free books, courses and cheat sheets, organised by language and subject and available in many languages. Check here before buying anything. A surprising number of standard texts are legally free from their authors.

A maintained map of the agent ecosystem: frameworks, platforms, open source projects and the companies behind them. The field moves fast enough that a curated list beats searching. Use it to find prior art before you build something that already exists.

A short page of Git recovery recipes organised by the mistake you just made rather than by the command you need. Bookmark it before you need it, because you will need it.

Community written summaries of command line tools showing the handful of invocations people actually use, as a replacement for wading through a manual page. Available as a command you install.

A large curated list of questions for one to one meetings, grouped by purpose, useful from either side of the table. Removes the awkward silence that ruins most of these conversations.

A free framework describing what each engineering level means across technology, system ownership, people, process and influence, as radar charts you can compare yourself against. Makes the promotion conversation concrete.

The documentation for hundreds of languages and libraries in one fast searchable interface, available offline. Replaces a browser full of documentation tabs with a single keystroke.

One page with the time and space complexity of every common data structure operation and sorting algorithm, colour coded so the expensive cases are obvious. The single most reused reference in interview preparation.

A long running index of machine learning libraries, tools and datasets organised by language and by task. The fastest way to find out what already exists before you write it yourself.

Free, entirely visual explanations of the concepts that keep coming up, from how DNS resolves to what an API gateway does to why Kafka is fast. Built to be scanned in two minutes when you need a refresher, not read as a book.

A filterable table of practice problems tagged by pattern and company, with progress tracking that persists in your browser. Free, no account, and it answers the question of what to solve next in about five seconds.