An open source semantic network (Creative Commons license) for AI and ML development. Semantic nets encode the meaning of words and concepts for information processing systems. Seems to encompass several spoken languages. Curated to avoid stereotypes. Still an active project. Data elements have a concept of external URLs, which link to other data sources with machine-parseable data related to that element.
Redash is a web console for interfacing with databases, building queries and reports, and visualizing results. Includes SQLite, MySQL, Postgres, and even JSON documents. Snippets can be saved. Caches results, can autoupdate. Can join across different databases. Dashboards can be shared via unique links. Of course, has an API.
Github repo: https://github.com/getredash/redash
Download a PDF, print it out, instant graph paper.
Cayley is an open source graph database application, suitable for network mapping or storing graph-like data. Sits on top of NoSQL database servers. Written in Go. Has its own REST API server, query editor, and query visualizer. Supports multiple query languages. Can use multiple back-end databases to actually store the data.
BinNavi is a tool for performing static and dynamic reverse engineering of executables for a number of platforms - x86, ARM, PowerPC, and MIPS. Can connect to remote debuggers on other systems to examine running code. Extensible with scripts, can annotate call flow graphs. The source is on Github: https://github.com/google/binnavi
A cheatsheet of datastructure access and algorithm complexities in O-notation. Look up Excellent, Good, Fair, Bad, and Horrible by both access time and memory utilization. sorting graph heap
A module for python that abstracts away the annoying parts of ncurses and lets you build console-based user-interfaces. Has a collection of widgets that can be assembled into larger projects. Also has graph, text editing, file browsing, subprocess initiation and monitoring, color palettes, sub-windows, and font manipulation primitives.
The homepage of the Open Graph protocol, a system of tags for turning web pages into smart objects in a social graph. Describes what kind of content it is (which implies how to treat it) and allows functionality to be imported from social media sites. Supplies much greater context for web pages. Includes multimedia content.
npm2dot is a utility which takes a list of NPM modules installed to support a particular package and generates code for dot (part of graphviz) which can be used to generate a visual map of what's there and how it fits together.