Small, sharp tools
built to last.

A file archiver that runs on an 8088 — and on your laptop

A lightweight archiver built for maximum portability. The archive core is strict ANSI C89 and compiles on virtually anything with a C compiler; platform-specific concerns (file I/O, encoding, GUI) live in isolated frontends. Same .bolt archive, from MS-DOS to modern Linux.

• 40+ platforms, 8 CPU families — Linux, Windows, macOS, AmigaOS, Atari TOS, Classic Mac OS, MS-DOS, OS/2, RISC OS, Haiku, Plan 9, Solaris, z/OS, WebAssembly and more
• Compression across tiny and modern targets — BoltLite, BoltLZ, and Fluff on modern builds; LZSS for 16-bit targets
• Compatibility profiles — target-aware names, aliases, and codec limits for Atari ST, DOS, AmigaOS, Classic Mac, Plan 9, Haiku, and more
• LAN transfer built in — listen, scan and --send stream archives straight to another machine on the network
• Format v5 — per-block CRC-32, Unix permission bits, and archive-size validation for early corruption detection
• CLI, FLTK GUI, and Total Commander plugins for 32- and 64-bit Windows

• ANSI C89
• BSD-2-Clause
• FLTK
• OpenMP
• WASM

Drag files in, get verified hashes out

A cross-platform hash generator and validation engine. Drop files or whole folders onto the window to generate a digest file next to your data — or drop an existing .sfv / .md5.txt and it flips into validation mode, recomputes everything, and reports what matches.

• 12 algorithms — CRC32, MD5, SHA-1, SHA-256/384/512, SHA3-256/384/512, BLAKE3, xxHash64 and xxHash3
• Recursive by default — drop a folder and every file below it is hashed, with paths stored relative to a common base
• Validation mode with clear per-file status: OK, missing, or mismatch
• Drag-and-drop that actually works on Linux — a custom X11 XdndProxy layer fixes drops under Cinnamon, Mutter and other reparenting compositors
• Self-contained C11 build on raylib — no system hashing libraries required

• C11
• raylib
• raygui
• BLAKE3
• X11 DnD

Lossless audio conversion, one drop at a time

A lightweight desktop app that converts audio to and from FLAC by drag-and-drop. Drop a file or an entire folder tree and it encodes in the background while the UI stays responsive — then shows you exactly how much space each file saved.

• In: WAV, AIFF, FLAC  ·  Out: FLAC, or WAV when decoding back
• Never blocks — encoding runs on a detached worker thread, so large batches don't freeze the window
• Compression levels 0–8, with per-file size deltas reported after every run
• Optional deletion of the source file after a verified encode, plus an error log for failures
• Custom CLI parameters passed through to the system flac binary for advanced use

• C11
• MIT
• raylib
• libFLAC
• libsndfile

A text editor whose files are encrypted at rest

A small UTF-8 text editor that saves to .txx — a compressed and authenticated encrypted document format. Modern cryptography, a C17 core with no application logic in the UI layer, and a binary small enough to carry on a stick.

• XChaCha20-Poly1305 + Argon2id via Monocypher, with a fresh salt and nonce generated on every save
• Tamper-evident — the 96-byte header is authenticated as AEAD associated data, so any modification fails the auth check
• Three frontends — an FLTK desktop GUI, a full terminal editor (etui) built on FTXUI, and a CLI for scripted pack/unpack
• Syntax highlighting — Markdown and 31 code languages in the GUI and etui
• Security controls — GUI Lock Now, optional inactivity locking, clipboard settings, and best-effort memory locking
• 12 bundled Lua plugins — process selected text or whole documents in the GUI and terminal editor, with interactive prompts and cancellation
• Real UTF-8 handling — detects and transcodes UTF-16, Windows-1252 and ISO-8859-1, and analyses line endings
• Payload is DEFLATE-compressed before encryption; the Windows installer associates .txx files

• C17
• C++17
• GPL-3.0
• Monocypher
• FLTK
• FTXUI

Log your hours, export a clean Markdown report

A lightweight desktop time tracker for logging work entries and exporting them as Markdown tables. Built on Avalonia UI and .NET, it runs the same on Windows, Linux and macOS, and keeps everything in a local SQLite file — no account, no server, no network connection.

• Fast entry — description, project, start and end time, with day-by-day navigation
• Markdown export for any date range, ready to paste into an invoice or a report
• Bilingual UI — English and Swedish, switchable at runtime
• Yours alone — all data lives in TimeReport.db under your local config directory
• Per-user Windows installer, no admin rights required

• C#
• .NET 10
• Avalonia
• SQLite
• MIT

A coding assistant that never leaves your machine

A keyboard-driven terminal coding assistant backed by local inference. Point it at a git repo, pick what the model sees, and review every proposed edit file by file before it touches disk. Ollama by default, with llama.cpp or any OpenAI-compatible server as alternatives. No cloud required.

• Five screens, all keyboard — Files (F1), Ask AI (F2), Editor (F3), Review (F4), Settings (F9)
• Gated edits — proposed changes land on a per-file diff screen; accept or reject individually, with a git snapshot taken before the first write as an undo net
• Local RAG — build a SQLite embeddings index for repos too large to hand-pick, so relevant chunks are retrieved automatically
• Opt-in extras — sandboxed calculator, approval-gated shell commands, private web search via Brave or self-hosted SearXNG, and a verify-then-auto-fix test loop
• Sessions autosave per project and resume; Ctrl+T shows exactly what was sent on the last turn

• Python 3.11+
• MIT
• Textual
• Ollama
• llama.cpp