
IrfanView
XnView MP
ImageGlass
FastStone Image Viewer
qimgv
JPEGView
qView
nomacs is a free, open source image viewer, which supports mu

NovoPsych
Clinical assessment tools for psychologists, therapists and occupational therapists. Send measures by secure link and review scored results, severity bands and reports.

Which is more popular?
Based on our record, nomacs seems to be more popular. It has been mentioned 16 times since March 2021.
Website, pricing, platforms and company facts side by side.
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| Website | nomacs.org | clientforms.app |
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In their own words, as submitted to SaaSHub.


No description of nomacs yet.
Clinical assessment tools for psychologists, therapists and occupational therapists. Send measures such as the PHQ-9, GAD-7 and DASS-21 by secure link and get scored results, severity bands and reports ready to review. The catalogue also includes DSM-5 ADHD assessments and autism screening tools....
What each product offers, as listed by its team.


Possible disadvantages
An editorial look at what each product does well and who it suits.


Overall verdict
Why this product is good
Recommended for
Nomacs is recommended for photographers, graphic designers, and casual users who need a reliable and feature-rich image viewer to manage and edit their image files.
Overall verdict
Why this product is good
Recommended for
Walkthroughs and reviews on video.
nomacs: Image Viewer
More videos
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How often each product is chosen within a category, 0–100% relative to the other.


As answered by people managing nomacs and ClientForms.app.
ClientForms.app's answer:
Frontend: Next.js 15 (React 19), Tailwind CSS Backend: Supabase (PostgreSQL, Row-Level Security) Authentication: Clerk Payments: Stripe Hosting: Vercel (Sydney region) Database hosting: Supabase (Australian data residency)
ClientForms.app's answer:
Psychologists who assess ADHD and autism. Typically private practice, solo or small group (1-5 clinicians), currently using paper forms and spending hours on admin per assessment. They want something that works and is secure.
ClientForms.app's answer:
Neurodivergent-first design. Most digital forms just replicate paper online. ClientForms is built specifically for ADHD and autism patients - progress bars with time remaining (helps with time blindness), softer colours instead of harsh white, sticky headers so you always know where you are. The forms are designed to reduce anxiety and improve completion rates.
ClientForms.app's answer:
Most clinical software treats patients as an afterthought. ClientForms is designed specifically for neurodivergent users who are filling out the forms, progress indicators, time estimates, calmer colours, predictable layouts. One link, no signup required, works on any device. Patients just open and complete.
Share your experience with using nomacs and ClientForms.app. For example, how are they different and which one is better?
External articles and on-site reviews we used to compare the two products.


Like other apps Nomacs also supports all basic image editing options out of the box, Nomacs is free to use open-source image viewer that supports multiple platforms.
nomacs is a free image viewer for windows, linux, and mac systems, which is licensed under the GNU Public License v3. nomacs is small, fast and able to handle the most common image formats including RAW images....
7 Best Photo Viewer Apps for Windows 10 in 2019What’s wrong with the default Microsoft Photos on Windows 10?1. IrfanView2. Nomacs3.HoneyView4.XnView5. FastStone Image Viewer6. Imagine
We have no reviews of ClientForms.app yet. Be the first one to post
Recommendations tracked on public social media and blogs since March 2021.


Be careful with Irfanview and XNView as these are free strictly for personal use (non commercial). An open-source alternative I've been using is: https://nomacs.org/. - Source: Hacker News / about 2 years ago
For Linux users looking for something similar to IrfanView, nomacs is the closest I found to IrfanView since I moved away from Windows: https://nomacs.org/. - Source: Hacker News / over 2 years ago
How that cmyk profile is shown depends on the image viewing app too and if it [the app] can show that colour profile. Have you tried opening the image in a webbrowser, if it's updated and your monitor has the specs for it, try drag&drop... Source: over 3 years ago
Tracking ClientForms.app since Dec 2025.
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IrfanView ... one of the most popular viewers worldwide.
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NovoPsych is a tool that is used for outcome monitoring via conducting psychological tests online.
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XnView is a free software that allows you to view, resize and edit your images. It supports more than 500 different formats!
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You can use Image to view your digital images and photos of many different formats.
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FastStone Image Viewer is a fast, stable, user-friendly image browser, converter and editor.
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Simple image viewer written in qt. Supports webm playback.
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