Onshape (free plan)
PTC
Parametric CAD in the browser with version control. On the free plan every document is public.
Get it from the vendorBrowser-based tools are the fastest way in: no installation, no dependence on the operating system, and you can work from a machine where you have no admin rights — a lab, or a site office.
This is where all the ADIT calculation programs sit, along with online engineering calculators, GIS tools and cloud simulation platforms. Some run entirely on your own machine and the data never leaves the browser; others run the computation on a server.
That distinction matters when the design is sensitive: check whether the calculation is local or in the cloud, and in the cloud case, whether the output is stored publicly. It is stated in the licence terms on each software page.
119 results
FACADESOFT — curtain wall and glazing design
ADIT Ltd (ADIT)
Designs curtain wall and glass facade fixings.
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Parsec
Parsec Cloud (Unity Technologies)
Very low-latency remote desktop suited to heavy graphics work, free for personal, non-commercial use only.
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Pavement Designer
American Concrete Pavement Association
Concrete pavement design from the American Concrete Pavement Association.
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PAVEXpress
National Asphalt Pavement Association
Online pavement thickness design based on AASHTO methods.
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PDF24 Creator / PDF24 Tools
Geek Software GmbH
Free PDF toolbox: an offline Windows program plus a browser version — merge, split, compress, OCR, convert and a PDF printer.
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PeakFQ
U.S. Geological Survey (USGS)
Flood-frequency analysis of annual peak flows following Bulletin 17C.
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Photopea
Ivan Kutskir (Photopea)
A Photoshop-style image editor in the browser with layers and PSD support, processing files on your own computer without uploading them.
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Potree
Markus Schütz / TU Wien
Browser viewing of huge LiDAR and scan point clouds, with distance, area, volume and height-profile measurements.
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RAILSOFT — railing and balustrade anchor design
ADIT Ltd (ADIT)
Designs railings and the anchors that hold them.
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Proton Pass
Proton AG
End-to-end encrypted password manager from Switzerland’s Proton, with email aliases that hide your real address.
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PVGIS
European Commission Joint Research Centre
Free European Commission web tool: solar radiation and expected PV output anywhere in the world, including trackers, off-grid systems and TMY data.
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Ray Optics Simulation
Ray Optics Simulation Project
Light ray simulation in the browser — lenses, mirrors and optical fibres.
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REopt
National Laboratory of the Rockies (formerly NREL)
Online tool for the economics and optimal sizing of PV, wind, storage and CHP for a building, campus or microgrid.
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Screenity
Alyssa X
Open-source Chrome extension for recording the screen, a tab or the camera, with on-screen drawing and local saving, no account.
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SkyCiv Free Beam Calculator
SkyCiv
Free browser beam calculator: reactions, shear and moment diagrams, deflection and stress for simple and cantilever beams.
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Stirling-PDF
Stirling PDF Inc.
Open-source PDF toolkit with dozens of tools — OCR, compare, redact, convert — as a desktop app or a self-hosted server.
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BALCSOFT — balcony and balustrade fixing design
ADIT Ltd (ADIT)
Designs the anchoring of balconies, railings and their connections.
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StreamStats
U.S. Geological Survey (USGS)
Browser-based GIS application for delineating watersheds and estimating streamflow statistics in the United States.
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Super Productivity
Super Productivity project
Task manager with time tracking — log hours per project, Pomodoro timer and Jira, GitHub and GitLab integration.
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Sweet Home 3D
eTeks
Draw a floor plan and see the room in 3D as you go.
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TeamViewer
TeamViewer SE
The best-known remote control and support tool, free for personal use only, with automatic detection of commercial use.
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VERT
VERT-sh (open-source project)
Open-source in-browser file converter: images, audio and documents are converted on your own computer without uploading them.
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WaveDrom
WaveDrom (Aliaksei Chapyzhenka)
Draws digital timing diagrams and register maps from a simple text description — in the browser or as a desktop app.
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