The Underground

The portable multi-tool for security researchers. Sub-GHz (125/433/868MHz), NFC/RFID read/write/emulate, infrared, GPIO, BadUSB, iButton. Captures car remotes, gate openers, and access controls. Full documentation for every module and firmware feature.

Professional RFID research tool. LF/HF read/write/emulate, key cracking (Mifare, iClass, EM4x). Used by physical penetration testers worldwide. Supports most access control technologies in use today.

$25-30 USB dongle turns your laptop into a radio scanner (500kHz-1.75GHz). Track aircraft ADS-B, ships via AIS, decode weather satellites, intercept pagers, monitor radio. The best RTL-SDR v3 has the lowest noise floor.

Listen to shortwave radio from 500+ receivers worldwide in your browser. No hardware needed. Tune HF bands, listen to numbers stations, explore the spectrum. The internet of radio, free, no signup.

Community database of 500+ radio signals with audio samples, spectrum screenshots, frequencies, and decoding instructions. When you hear something on the SDR and don’t know what it is, this tells you. Military, aviation, espionage, anomalous signals all documented.

Free software toolkit for signal processing. Build radio systems by connecting flowgraph blocks. Decode satellite transmissions, build spectrum analysers, create custom radio protocols. Used by researchers, universities, and intelligence agencies.

Open-source NFC/RFID emulation platform. Emulate contactless smart cards, clone badges, capture card data passively. Full Mifare Classic, DESFire support. Used in physical red team assessments to bypass access control.

The complete WiFi network security suite. Packet capture, WEP/WPA/WPA2 cracking, replay attacks, deauth, fake AP. Works with any WiFi adapter supporting monitor mode and packet injection. Industry standard for wireless assessments.

The largest community of hardware hackers. 50,000+ documented projects: RF implants, SDR builds, hardware trojans, LoRa networks, Arduino exploits. Every project documented with code, schematics, and build logs.

The premier locksport community. Free training materials, picking guides, decoder techniques, bump key methods, bypass tools. Open Archive has every presentation from 15 years of security conferences. Chapters worldwide.

The largest locksport forum. 50,000+ posts on picking technique, tool reviews, lock ratings, bypass methods, safe manipulation. Every major lock brand reviewed. Community-rated security guides.

The definitive physical penetration testing educator. DEF CON Hall of Fame. Talks: hotel room bypass, elevator hacking, data centre physical security. Every talk on YouTube, free forever.

The most trusted independent lock reviewer. 1,000+ video reviews of locks from every manufacturer: Abloy, Medeco, Mul-T-Lock, ABUS. Demonstrates exactly how each lock fails. Buy security hardware? Check here first.

Free video training library covering every lock type and picking technique. 200+ instructional videos. Progressive skill building from beginner to advanced bypass. No purchase required to access the training.

The canonical free beginner guide to lock picking: pin tumbler, wafer, disc detainer, tubular locks. Understanding the mechanics is the foundation. Free PDF. Knowledge of how locks fail makes better security decisions.

The original biohacker community. NFC implants, magnet fingers, RFID chips, subdermal LEDs, transcranial stimulation, grinder philosophy. 10+ years of documented procedures, outcomes, and technical guides.

Leading supplier of implantable tech: NFC chips, RFID implants, flexible biopolymer tags, cryptographic smart card implants, xSIID with LED. Full documentation and installation guides free. The shop that made biohacking mainstream.

The most rigorous independent database of supplement and nootropic research. Every claim sourced from peer-reviewed studies. Creatine, modafinil, racetams, adaptogens, sleep stack, cognitive enhancers. No affiliate bias.

Gwern’s rigorously documented self-experimentation — personal blinded trials, statistical analysis. Modafinil, melatonin, lithium, racetams, LSD microdosing, all data-driven. The gold standard for rational biohacking.

Open-source brain-computer interface hardware and software. Read EEG, EMG, ECG signals. Build neurofeedback systems, control devices with thought, study sleep stages. Full docs, API, and community projects free.

Research-backed protocols for human performance: heat shock proteins via sauna, cold hormesis, sulforaphane, omega-3 optimisation, fasting, VO2 max. Free podcast and reports. The serious biohacker’s scientific baseline.

Multidisciplinary Association for Psychedelic Studies. Leading FDA-approved psychedelic research: MDMA for PTSD (Phase 3), psilocybin for depression. Full clinical trial data, protocols, and therapist guidelines published free.

30-year archive of psychoactive substance information: pharmacology, effects, dosage, safety, legal status, chemistry, cultural history. 100,000+ documents, the most comprehensive harm-reduction resource ever assembled. No paywall.

Robert Monroe’s consciousness research institute. Hemi-Sync binaural audio, Gateway Experience (the CIA-studied program), OBE protocols. Gateway Process document is now declassified on CIA.gov — read it free first.

Complete RAW archive: essays, interviews, lectures on consciousness, reality tunnels, guerrilla ontology, Discordianism. Author of Illuminatus!, Prometheus Rising. Required reading for understanding how belief systems trap and liberate consciousness.

The most sophisticated free ambient sound generator. Binaural beats, isochronic tones, brown noise, Tibetan bowls, neural oscillation inducers. 200+ calibrated soundscapes. Used by researchers, meditators, and anyone who needs to think without interruption.

The holy book of Discordianism. Satire that became a foundational text of chaos magick and counter-culture. First distributed freely in 1963. Every copy has always been free. The best introduction to questioning consensus reality.

The Quran in Arabic with 20+ translations, word-by-word analysis, tafsir, 50+ reciters. The Paraclete (John 14:16) in Aramaic is Menahhm = Comforter. In Arabic: Muhammad. The linguistic connection most seminaries will not discuss.

The nine major hadith collections in Arabic and English: Bukhari, Muslim, Abu Dawud, Tirmidhi, Nasai, Ibn Majah, Malik, Ahmad, Darimi. Searchable by keyword, narrator, grade. Complete authenticated sayings of the Prophet (s) free.

The complete Jewish textual library: Torah, Mishnah, Talmud, Midrash, Kabbalah (Zohar, Sefer Yetzirah), legal codes, philosophy. 3,000+ texts in Hebrew and English, cross-referenced. The digital Beit Midrash. Free forever.

The Bible in 200+ translations. Greek interlinear, Hebrew OT, audio Bible, commentaries. Iesous (Greek) = Isho (Aramaic) = Yeshua (Hebrew) = Isa (Arabic). The etymology connects all three Abrahamic traditions through one name.

High-resolution scans of the oldest biblical manuscripts (3rd century BC-1st century AD). Isaiah Scroll, Community Rule, War Scroll, and apocryphal texts excluded from the canon. Read what was found in the caves before committees decided what to include.

Early Christian texts excluded from the canon: Gospel of Thomas (114 sayings of Jesus), Gospel of Philip, Nag Hammadi Library, Didache. What was removed, by whom, and why. The suppressed record of early Christianity before orthodoxy solidified.

Definitive archive of hermetic and occult texts: Crowley complete works, Golden Dawn materials, Thelemic scriptures, Hermetica, Rosicrucian texts, alchemy, Tarot scholarship. The library of Western esotericism.

10,000+ religious, spiritual, and mystical texts: Hindu, Buddhist, Sufi, Shinto, Zoroastrian, Celtic, Norse, Native American, Western esoteric. No paywall, no registration. The original sacred text archive since 1999.

Ahmad ibn Ali al-Buni’s 13th century masterwork on Islamic esoteric sciences: abjad numerology, divine names, geometric talismans (wifq squares), letter mysticism. The foundation of the Islamic magical tradition. Full Arabic text, free on Archive.org.

Comprehensive free astrology: natal, transit, progressions, solar return, synastry, composite. Swiss Ephemeris precision. Interpretations by Liz Greene and Robert Hand. The serious astrologer’s reference since 1996.

Official Human Design chart from the Jovian Archive — synthesis of I Ching, Kabbalah Tree of Life, Hindu Chakra system, and quantum physics. Free unlimited charts. Know your Type, Strategy, Authority, Profile, and Incarnation Cross.

Complete archive of anarchist theory: Kropotkin, Bakunin, Emma Goldman, Murray Bookchin, Hakim Bey (TAZ), Guy Debord’s Society of the Spectacle. 10,000+ texts as PDF, epub, or print. Philosophy of those who question all authority.

The oldest continuously published hacker magazine. 70 issues from 1985 to present. Exploitation techniques, phreaking, kernel exploits, shellcode. Every major advance in offensive security was first published here. Required reading.

Ultimate collection of exploitation payloads and bypass techniques: SQLi, XSS, XXE, SSRF, SSTI, LFI/RFI, command injection, open redirect. Every WAF bypass, every encoding trick. Community-maintained GitHub repository.

Unix/Linux binaries that can be abused for privilege escalation, data exfiltration, reverse shells, and bypass when you have limited execution. Every binary entry has exact commands. The pentesters’ survival kit.

Windows-native binaries weaponised by attackers to bypass security controls: Certutil for download, MSHTA for code execution, Regsvr32 for bypass. Every Windows system has these. Know how they are weaponised.

Gordon Lyon’s definitive Nmap guide — free online. Every scan type, OS detection, NSE scripting, firewall evasion. 468 pages free at nmap.org/book. The reference professional pentesters use.

Offensive Security’s public archive of exploits and shellcode. Every CVE with a working proof-of-concept. Search by platform, type, author, or CVE number. The raw technical record of how vulnerabilities actually work.