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SMTP
smtp.ximg.app
Simple Mail Transfer Protocol — session flow, commands, response codes, ports, TLS, SPF, DKIM, DMARC
🏛️
Ancient Rome
rome.ximg.app
SPQR — Roman social structure, 9 emperors from Augustus to Constantine, 6 famous battles, 8 engineering marvels (Colosseum to aqueducts), the legion hierarchy, Roman pantheon, and a full timeline 753 BC to 476 AD
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BBS
bbs.ximg.app
Bulletin Board Systems (1978–1998) — BBS history, ANSI art & artscene groups, 6 classic door games (LORD, Trade Wars, Usurper), 6 major BBS software packages, FidoNet explained, and a full timeline from CBBS to the web
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Modem
modem.ximg.app
The dial-up era (1958–2013) — 12 AT commands explained, baud rate history from 300 bps to 56K, ITU standards (V.21 to V.92), the ISP era (AOL, CompuServe, Prodigy), the anatomy of the connection handshake sound, and a timeline
🖥
Commodore 64
commodore.ximg.app
C64 & Amiga (1982–1994) — C64 hardware specs (VIC-II, SID chip deep-dive, ADSR envelopes), all 16 palette colors, 8 legendary games, demoscene history (raster tricks, FLI/FLD), Amiga model lineup, and a full Commodore timeline
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Circuit Builder
circuit.ximg.app
Drag-and-drop circuit canvas with resistors, capacitors, inductors, LEDs, diodes, transistors, and logic gates. Includes DC analysis calculators (Ohm's law, voltage divider, RC time constant) and a component reference guide
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Protocol Visualizer
protocol.ximg.app
Animated serial protocol waveforms for UART, SPI, and I²C — configure baud rate, data bytes, parity, SPI mode, and I²C address to see real-time timing diagrams with labeled bits, start/stop conditions, and ACK pulses
🌀
cURL Builder
ximg.app/curl/
GUI curl command builder — method, URL, headers, body, auth (Basic/Bearer), common flags, live command preview, and a searchable flag reference.
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PS1 Generator
ps1.ximg.app
Interactive bash PS1 prompt generator — 15 prebuilt themes (Dracula, Nord, Powerline, Hacker, Retro...), live terminal preview, drag-to-reorder components, color pickers, and one-click copy.