Dev tools · alternatives · 2026
24 alternatives to Virtual Sun
We built CircadianLab, a free in-browser tool for lighting design. It uses webGPU shaders to calculate melanopic equivalent daylight illuminance (mel-EDI, formerly EML, relevant for circadian rhythm and WELL v2 compliance), photopic illuminance, UGR glare per CIE 117, and actual daylight through windows and skylights. It has a database of 400,000+ IES files from 81 lighting manufacturers and supports easy sharing of scenes/configs with other people. Daylight uses the NREL Solar Position Algorithm and a Perez clear / intermediate / overcast sky model, mixed into the same…
Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Virtual Sun launched in 2020; newer entries below may have overtaken it.
- 1
f.lux▲1,353Adjusts your computer's display to adapt to the time of day
2014 · justgetflux.com · its alternatives →
- 2
- 3
For HTML Day 2025 [1], I made a web service that displays the current sky at your approximate location as a CSS gradient. Colours are simulated on-demand using atmospheric absorption and scattering coefficients. Updates every minute, without the use of client-side JavaScript. Source code and additional information is available on GitHub: https://github.com/dnlzro/horizon [1] https://html.energy/html-day/2025/index.html
2025 · sky.dlazaro.ca · its alternatives →
- 4
f.lux for iOS▲596Auto adjust your iOS display based on the time of day
2015 · justgetflux.com · its alternatives →
- 5
- 6
Build beautiful documentation websites with ease
2023 · starlight.astro.build · its alternatives →
- 7BB
Hi HN — author here. iesna.eu is a browser-based ecosystem for working with photometric data: parsing standard luminaire files (LDT/EULUMDAT, IES LM-63, Oxytech, ATLA-S001), running design calculations against EN 13201 / ANSI/IES RP-8 / CJJ 45 / IES-IDA MLO, and (the part I most want to show off here) rendering real urban scenes in Bevy with the photometric data driving actual streetlight behavior, including sky-glow contribution. The Skyglow Analysis demo loads a real LDT file into a Bevy scene (Khronos Bistro test asset). The luminaire's intensity distribution…
May 2026 · iesna.eu · its alternatives →
- 8
Nikmati kemudahan deposit via QRIS, Dana, OVO, LinkAja, GoPay, dan bank BCA/Mandiri/BRI di Buaya138. Proses cepat tanpa potongan. Minimal deposit 10rb.
2019 · sunlight.live · its alternatives →
- 9
Kiën Light: Intelligent daylight at your fingertips
2016 · artofthekickstart.com · its alternatives →
- 10
A hobby project of mine that was surprisingly easy to put together! I love waking up and seeing the freshly generated image.
2024 · github.com · its alternatives →
- 11
2022 · github.com · its alternatives →
- 12
This is a little hobby project that I hope you enjoy. You can see where the International Space Station is now, with live HD video from NASA, on a realistic 3D globe. The positions of the sun and moon are also accurate, though distances aren't to scale. The clouds are also near-realtime; I span that out into a separate project at https://clouds.matteason.co.uk, where the cloud images I create from EUMETSAT data are freely available. I've got more features almost ready to go, like the ability to turn off all UI, toggleable clouds and turning off the day/night cycle I'd love for…
2024 · iss.matteason.co.uk · its alternatives →
- 13
Cosmic-light▲84A stunning Dynamic Island Control Center for Windows
Feb 2026 · github.com · its alternatives →
- 14MC
2015 · nikital.github.io · its alternatives →
- 15
This is a service I've built to provide equirectangular cloud maps of the whole Earth, updated every 3 hours, for free. It's based on infrared and visible light data from EUMETSAT, processed to enhance the clouds and try to reduce the impact of surface temperatures on the final image. I built it because it's surprisingly hard to find these kinds of images in a format that's useful to developers and hobbyists. I was building a 3D ISS tracker and wanted to include live clouds but couldn't find anything good, so I got sidetracked, and here we are.
2023 · github.com · its alternatives →
- 16
- 17
I kept trying to explain how important outdoor light is and how most people aren’t getting enough. Eventually I figured that showing is more effective than telling. So we built a free app that uses your Apple Watch or iPhone to automatically track your light exposure throughout the day. It tells you if you’re getting enough, shows you how consistent you are, and rewards habits that support hormone balance. It's in beta on TestFlight, let me know what you think!
2025 · lumehealth.io · its alternatives →
- 18
- 19
Sunn▲118A smart light fixture that brings the changing sun indoors
2015 · sunnlight.com · its alternatives →
- 20
Solace▲171macOS gives you three appearance options: Light, Dark, or Auto. Auto follows sunset, which is a surprisingly blunt heuristic. It doesn't account for season (dark mode at 3:50pm in December, light mode at 9pm in June), and it has zero awareness of actual conditions outside. Overcast and dark at 2pm? Your Mac doesn't care. The deeper problem is that macOS treats appearance, wallpaper, and colour temperature as unrelated settings. You end up stitching together separate tools that don't know about each other, or you just live with the defaults and accept the friction. Solace tries to solve this…
Feb 2026 · theodorehq.com · its alternatives →
- 21
My in-network Node app for controlling my kids' nightlights (like Hue or FastLED) via website or IoT buttons - ecaron/smart-nightlight-manager
2019 · github.com · its alternatives →
- 22
- 23BS
There should have been a video here but your browser does not seem to support it. Over a number of years, I’ve experimented with various projects which use luminous paint and ultra violet LEDs to make raster or vector displays. You can see an indifferent video of the very first one here:
2025 · blog.karliner.net · its alternatives →
- 24
3D movements telling you the time to the next sunrise
2024 · apps.apple.com · its alternatives →
Also compare
Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →