GCHQ open-sourced its "Cyber Swiss Army Knife", and CyberChef became the web app security analysts, incident responders, and CTF players reach for when data needs decoding, decrypting, or dissecting. Its interface is four panes: paste or drag input (files up to 2GB), search a categorized library of hundreds of operations, drag them into a recipe with arguments, and read the output. Operations span Base64, hex, and XOR encoding; AES, DES, and Blowfish encryption; classical ciphers from Caesar to Railfence; hashes and checksums; compression; regex and string extraction of IPs, domains, and URLs; timestamp conversion; and parsers for IPv6, X.509 certificates, and more. Recipes chain arbitrarily - convert from a hexdump then decompress, decrypt AES pulling the IV from the cipher stream, or let the Magic operation auto-detect several layers of nested encoding. Auto Bake re-runs the recipe live as input or arguments change, Step executes one operation at a time for debugging, and flow control (forks, subsections, registers) applies different operations to different parts of the data. Recipes save to files or share as URLs encoding the full pipeline. Crucially, CyberChef is entirely client-side JavaScript - nothing uploads anywhere - and self-hosting guarantees an unmodified copy inside your own network, where malware artifacts belong.

TgWitness preserves what your Telegram account actually saw, even when a message is edited three times and deleted before breakfast. A collector watches the chats, folders, or whole account you choose and records every captured message, edit version, and deletion notice in a local journal. The workspace reads like a familiar conversation view, with captured edits and deletion markers alongside the messages, and a searchable journal timeline ties observations together across chats. Open the edit history to compare versions side by side without overwriting the earlier observation. Connect people, replies, and shared links across recorded chats to trace how a claim travelled. Each account gets an isolated workspace with its own session and signing key, so separate investigations never contaminate each other. When a case moves, export the record as readable HTML, structured JSON or CSV, or a signed ZIP bundle whose hash-linked, Ed25519-signed records expose any tampering, verifiable offline with an independent fingerprint. Optional local OCR and transcription make media searchable, signed webhooks announce new observations, and encrypted backups copy the journal and timestamped checkpoints to S3-compatible storage. Read-only MCP access lets approved tools query the archive without touching the collector. Coverage reports show honestly where downtime left gaps. Running on a dedicated VPS on RepoCloud with guaranteed CPU, RAM, and SSD, full root SSH access, and a browser serial console. MIT licensed.

Hunting for a suspicious file, process, or registry key across every endpoint becomes a single hunt in Velociraptor, an endpoint visibility and digital forensics platform. A web console sends tasks to clients on Windows, Linux, and macOS machines, which hold a persistent connection and run each task as soon as it is issued. A hunt runs a VQL artifact, one of more than 400 built in, across selected endpoints, picks up machines that reconnect later, and tracks which hosts have answered. Each hunt and collection opens into a notebook where markdown and live VQL cells group, filter, and timeline the results. A virtual file system browses a client's directories and fetches files through file, NTFS, and registry accessors, with hex and text viewers. Offline collectors bundle chosen artifacts into one binary that writes an optionally encrypted container for later import, suiting machines that never reach the server. Client event queries stream telemetry such as DNS lookups to the server, and server event queries can alert Slack, email, Elastic, or Splunk. Quarantine confines a host's network traffic to the Velociraptor server, and the Shell page runs commands on it. Sign-in works through Google, Azure, GitHub, OIDC, or SAML, with reader, analyst, investigator, and administrator roles. Responders reach for it during threat hunts, compromised host triage with KapeFiles targets, and dead disk image analysis. Running on a dedicated VPS on RepoCloud with guaranteed CPU, RAM, and SSD, full root SSH access, and a browser serial console. AGPL-3.0 licensed.