Spreadsheets deserve an engine that anyone can embed, audit, and run on their own server. IronCalc is an open-source spreadsheet engine with a browser editor that reads and writes real Excel files: open an xlsx, edit values and formulas in the grid, format cells, and save the workbook back without a round trip through a proprietary suite. The grid feels familiar on purpose, with a formatting toolbar for fonts, fills, borders, number formats, and alignment, sheet tabs along the bottom, and templates for invoices, expense trackers, calendars, timesheets, and project plans so a new workbook starts from structure instead of a blank page. Files import from xlsx and export again to the same format, which keeps IronCalc honest as a working tool instead of a viewer. Underneath, the calculation engine is a library other software can call, so the same formulas that evaluate in your browser can also run inside a Python script, a Node service, or a WebAssembly build embedded in your own product. Self-hosting puts the whole webapp behind your own address: one Docker Compose brings up the spreadsheet server with its proxy, and teams share workbooks from infrastructure they control rather than uploading budgets to a stranger's cloud. Running on a dedicated VPS on RepoCloud with guaranteed CPU, RAM, and SSD, full root SSH access, and a browser serial console. MIT and Apache-2.0 dual licensed.

Merge, split, compress, convert, edit, annotate, redact, OCR, and sign PDFs - BentoPDF packs over 130 tools into a privacy-first toolkit that runs entirely in the browser through WebAssembly. Files are never uploaded - processing happens in browser memory on the user's machine and disappears when the tab closes, which makes the tool GDPR-clean by architecture and safe for financial, legal, and internal documents. The engine combines WASM builds of PyMuPDF, Ghostscript, and CoherentPDF; Tesseract handles OCR with searchable text-layer output; Office conversions cover Word, Excel, and PowerPoint; and digital signatures use X.509 certificates (PFX/PEM) with the private key staying on the client. Because there is no server-side processing, deployment is a static-file exercise: a single Docker container, or any static host. A dedicated self-hosted build strips the marketing pages while keeping every tool, and air-gapped deployments are first-class - an automated script bundles the WASM modules, OCR language data, and fonts for fully offline networks. No accounts, no limits, no watermarks; TypeScript and Vite under the hood.

Pretty Please Print turns one office's shared 3D printer into an invite-only request board: colleagues upload a model and follow it from request to delivery. Requesters upload an STL or 3MF file, or start from a Printables link the owner enabled, and the mesh renders in the browser, auto-framed and draggable, so everyone checks the geometry first. Every request becomes a ticket that the printer owner moves through Requested, Accepted, Printing, and Delivery, or declines with a reason, and requesters can withdraw their own print before it reaches the bed. Slicer specifics like layer height, infill, supports, and temperatures ride along as notes on the ticket, a low, medium, or high priority keeps the owner's queue ordered, and a conversation thread on each ticket replaces lost chat threads. The owner curates the materials and colours on the shelf, with swatches and a rainbow whatever option, and defines the tips requesters can offer, preferred ones starred. Finished jobs collect in a filterable history: Print again reopens the form with the model copied server-side and fields adjustable, and one click sends a model straight to PrusaSlicer. Accounts are invitation-only; access can be revoked with a global sign-out, every change lands in an audit trail that cannot be edited, and the same tickets are exposed over a JSON API documented in OpenAPI 3.1 with a Swagger console. 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.