Engineering workspace
Syncster hosts focused apps for engineers. No feed, no noise—just worksheets, projects, and data you can rely on—from open-channel hydraulics in FlowStudio to geotagged field photos in Raven, and desktop apps written in Tessel, our own programming language.
Subdomains under syncster.dev
Open-channel hydraulics: channels, weirs, gradually varied flow, sluice gates, and more—organized in projects with optional cloud sync when you sign in with Google.
Turn geotagged JPEG, PNG, TIFF, or HEIC photos into a self-contained KMZ for Google Earth—with map pins, labels, field notes, and embedded thumbnails.
.raven project files with per-image notesA browser-based PDF toolkit—compress, combine, convert images to PDF, organize pages, edit content, and password-protect or unlock files—processed server-side and cleaned up right after.
Turn an ordinary video into a smooth, sped-up timelapse—upload a clip, choose a speed from 2× to 120×, and download the result. No signup, no watermark, and your upload is automatically deleted 24 hours after processing.
A browser-based YouTube downloader—paste a link, pick a quality, and save it as video (MP4) or audio (MP3). Files are fetched server-side and cleaned up right after. For educational use.
A song search engine—type an artist or title and get a list of downloadable MP3 files, each with an inline player. Searches the Internet Archive's legal catalog by default. For educational use.
A desktop spreadsheet written in pure Rust, with a from-scratch GPU-rendered
interface. Opens, edits, and saves Excel .xlsx files—and runs
Python right in a cell for the work a formula bar can't reach. macOS.
.xlsx: styles, tables, filters, rich text=py sum(A1:A10), plus your own functionsThe Syncster blog: practical walkthroughs for Google Sheets, Apps Script, and JavaScript automation (reports, email, triggers)—alongside longer reads on AI, LLMs, generative tools, and tech history.
Visit the blogMore apps will appear here as they ship.
Native apps for the Mac, written in Tessel
Our own programming language: small, declarative, and made for desktop apps. Describe what the window shows for the current state, and get a fast native app for macOS and Windows. The apps below are written in it.
.tsl files is a program: no project files, no build setupA desktop spreadsheet that opens your Excel and OpenDocument workbooks, calculates what Excel calculates, and starts in a blink.
LET and LAMBDA.xlsx and .ods, passwords includedA word processor that shows your document as pages, the way it will print, and opens the Word files people send you.
.docx, .odt and .rtf; exports PDFThe stability of slopes, two independent ways: finite elements with strength reduction, which find the failure on their own, and the slip circles engineers have trusted for a century.
