Testament is an advanced automatic unittests runner for Nim tests, is used for the development of Nim itself, offers process isolation for your tests, it can generate statistics about test cases, supports multiple targets (C, C++, ObjectiveC, JavaScript, etc), simulated Dry-Runs, has logging, can generate HTML reports, skip tests from a file, and more, so can be useful to run your tests, even the most complex ones.

KanjiVG (Kanji Vector Graphics) provides vector graphics and other information about kanji used by the Japanese language. For each character, it provides an SVG file which gives the shape and direction of its strokes, as well as the stroke order. Each file is also enriched with information about the components of the character such as the radical, or the type of stroke employed.

It is very easy to create stroke order diagrams, animations, kanji dictionaries, and much more using KanjiVG. See Projects using KanjiVG for a growing list of applications of the KanjiVG data.

Music Blocks is a great way to learn coding through music (as well as learn music through coding). Move colorful blocks around the screen to design dynamic musical creations. Test your code at the click of a button. Create everything from simple songs to puzzles and games.

TL;DR: OSC52 is an ANSI escape sequence that allows you to copy text into your system clipboard from anywhere, including from remote SSH sessions. Check vim-oscyank, a plugin which integrates OSC52 into Vim.

The world’s most widely used web app scanner. Free and open source. Actively maintained by a dedicated international team of volunteers.

Melrose is both a language and a tool to create and listen to music interactively, The language uses musical primitives (note, sequence, chord) and many functions (map, group, transpose) that can be used to create more complex patterns, loops and tracks. Melrose uses MIDI output to produce sound by any (hard or software) device attached. Melrose can also react on MIDI inputs to start, record and stop playing musical objects. A plugin is available for Microsoft Visual Studio for the best usage experience. For a quickstart, without any installation, you can use the Melrose playground.

Try to get through 8 levels by moving in all 4 spacial [sic] dimensions and reach your spaceship.

espoofer is an open-source testing tool to bypass SPF, DKIM, and DMARC authentication in email systems. It helps mail server administrators and penetration testers to check whether the target email server and client are vulnerable to email spoofing attacks or can be abused to send spoofing emails.

Daemon application able to fetch messages from supported websites and send them by mail. It can also be used to send a reply to a message (on a module which supports this feature), by piping an email to it.

Looks like it should be possible to read (perhaps even write) private messages on Reddit without having to deal with Reddit's own, pretty terrible, web interface. Worth looking into.

Typesense is an open source, typo tolerant search engine that is optimized for instant sub-50ms searches, while providing an intuitive developer experience.