Browser tabs, inboxes and web dashboards can scatter internet work across too many places. These Windows internet utilities include Postbox, Switchbar and SmartRSS.
This collection has 9 pay-once apps, priced from $3.99 to $89 one-time. 3 of them offer a free tier, including SmartRSS: RSS Reader & Podcast, Kanmail and Switchbar. Between them they cover Linux, Mac, Windows and Browser Extension. SmartRSS: RSS Reader & Podcast is our top pick from this list.
Last updated September 2026
Internet work often gets split between inboxes, feeds, databases, links and dashboards. These Windows utilities handle that work without a subscription, and each is sold as a one-time purchase.
Postbox puts all your email accounts in one place and adds fast search. Switchbar selects a preferred browser or email client for links. SmartRSS is an AI-powered RSS reader for content aggregation.
TablePlus handles database management, while Kanmail turns email chaos into kanban workflows. SmartRSS, Kanmail and Switchbar offer a free tier.
| App | One-time price | Platforms | Free tier |
|---|---|---|---|
| SmartRSS: RSS Reader & Podcast | Free tier, $19.99 one-time | Linux, Mac, Windows | Yes |
| Kanmail | Free tier, $49 one-time | Linux, Mac, Windows | Yes |
| Switchbar | Free tier, $20 one-time | Browser Extension, Mac, Windows | Yes |
| Postbox | $49 one-time | Mac, Windows | No |
| Video To Photo | $3.99 one-time | Windows | No |
| Eagle | $29.95 one-time | Mac, Windows | No |
| Radar | $14.99 one-time | Linux, Mac, Windows | No |
| Clobbr | $34.99 one-time | Mac, Windows | No |
| TablePlus | $89 one-time | Linux, Mac, Windows | No |
Prices are one-time license fees as listed on each developer's site and may change.
SmartRSS is an AI-powered RSS reader designed to transform how you discover and consume content across all your devices. With its cross-platform compatibility, you can manage your feeds on Android, iOS, macOS, and Windows through a single, consistent interface.
The app's AI features allow for customized actions, such as generating smart summaries and extracting key phrases, making your content consumption more efficient and enjoyable.
Ideal for content enthusiasts, SmartRSS offers a personalized experience with extensive theming options and a distraction-free reading environment. Its ability to integrate with various platforms, including YouTube and Reddit, ensures you never miss an update. With a one-time purchase, enjoy lifetime access to a comprehensive content aggregation tool that keeps your feeds organized and accessible.
Kanmail transforms your chaotic inbox into an organized kanban board, allowing you to manage emails with ease. By combining all your Gmail, Outlook, and other accounts into one unified view, it offers a seamless way to visualize and control your email workflow.
With features like color-coded senders and lightning-fast keyboard shortcuts, you can efficiently navigate through your tasks without missing a beat.
Designed for professionals who juggle multiple email accounts, Kanmail adapts to your unique workflows with unlimited customization options. Whether you're managing a sales pipeline or personal inbox, its flexible column arrangements cater to your specific needs. With a one-time purchase of $49, you gain a lifetime of productivity, ensuring your emails are secure and private.
Switchbar allows you to seamlessly select which browser, browser profile, or email client to use whenever you click on a link on both Mac and PC. Whether you have multiple browsers like Chrome, Edge, or Firefox, or various email clients such as Apple Mail, Spark, and Outlook, this tool simplifies your online navigation.
Switchbar’s powerful behavior rules can automatically choose the right browser or email client, minimizing the need for constant prompts. Imagine links from your company website automatically opening in Chrome, or email links always triggering your preferred email client.
With features like URL unshortener to reveal original URLs and tracking parameter stripper to remove unnecessary tracking parameters, Switchbar ensures a cleaner and more private browsing experience. Additionally, its deep linking capability allows you to open web links in popular desktop apps like Airtable, Figma, and Notion, further enhancing productivity.
System requirements: Compatible with macOS and Windows. Key functionalities include the ability to handoff links between Apple devices, integration with various browsers via extensions, and a powerful API that lets developers trigger actions from their own scripts.
Switchbar’s integration with WebCatalog also means it smartly identifies and opens links in the most appropriate installed apps, ensuring a smooth and intuitive user experience.
Experience the ultimate control over your email communication with Postbox. This desktop email client brings together all your accounts in one place, allowing for seamless management across your personal and professional life. With an emphasis on efficiency, you'll enjoy enhanced processes designed to make your daily email interactions faster and more intuitive.
The well-conceived features ensure that you maintain a clean and organized inbox, eliminating chaos and bringing clarity to your correspondence. Beyond organization, Postbox offers lightning-fast search capabilities so you can locate messages, files, and images in an instant. It also provides advanced composition tools to help you craft your messages with precision and style.
Coupled with a powerful Theme Editor for personalization and extension support through Postbox Labs, it's a fully customizable solution for your emailing needs. Security is paramount, ensuring your privacy is respected. Postbox promises never to compromise the integrity of your personal information with no email data transmitted to servers or any unsolicited ads.
Transform your videos into a gallery of stunning images with Video To Photo, the ultimate tool for extracting high-quality stills. Perfect for creating thumbnails, this app is a content creator's dream, making it easy to find just the right frame without additional photo shoots.
Enjoy effortless one-click operation to grab multiple photos from a single video, supporting a wide range of formats including mp4, m4v, wmv, avi, asf, and mts. Say goodbye to watermarks on your output with results delivered in pristine PNG format. Unlock the full potential with a one-time PRO purchase and benefit from ad-free experience and eternal free updates.
Ideal for social media enthusiasts, YouTubers, and anyone looking to share memories, Video To Photo is a powerhouse for producing high-quality images. Capture the essence of every moment and share your stories with clear, vibrant stills. It's the tool you've been waiting for to enhance your visual content without breaking the bank or compromising on quality.
Discover the next level of efficiency in managing design assets! Eagle's innovative application allows you to effortlessly store, organize, and access your vast array of design files. Keep your creative workflow uncluttered with Eagle's intuitive tagging and folder systems. Say goodbye to endlessly scrolling through disorganized directories.
Our smart folder feature even automates your organization, making sure you stay on top of your game. Annotate, tag, and classify – Eagle handles the heavy lifting so you can focus on inspiration and creativity.
But that's not all – our application seamlessly fuses with your design journey, encompassing advanced search capabilities with filters for color, keywords, and more, ensuring you swiftly locate the asset you need. Our integrated preview options cater to a quick glance or a detailed examination, saving you invaluable time.
Join the league of top-tier designers who have already integrated Eagle into their daily practice. Enhance collaboration with effortless syncing across various cloud platforms, and handle any file format thrown your way. Eagle isn't just about asset management; it's about refining your entire design process.
Aiming to save you from the time-consuming and distracting process of checking multiple metrics through different platforms, Radar amalgamates them into a simple and easy-to-use application. Its unique feature is its one-click installer that lets you import an array of data directly into the application. With a collection of data that is always growing, you can add more at your convenience.
Concerned about your privacy? Rest assured, none of your data leaves your device and there's no need to create an account to use Radar. But, that's just scraping the surface of its capabilities.
You can bring your own APIs, view up-to-date data, plot the change of your metrics over time on a line chart, set customized alerts for any significant changes in your data, and access the application using a keyboard-only global shortcut. Optimized for both light and dark themes, Radar is also working on bringing these features to mobile very soon.
Clobbr is not just another developer tool. It is your go-to solution whenever you need to test your API endpoints effortlessly, regardless if you are testing a REST, GraphQL or cloud function. It offers a way to make requests to various endpoints without hassle, assisting you in setting up request timeouts, headers, and payload among other parameters.
By exploring your result history and understanding your key API endpoints, you can delve into key statistics such as standard deviation, percentiles and more. Additionally, the software gives you the ability to access historical response timings using a variety of charts and tabular data for easier understanding, exploration and interpretation.
With just a few clicks, you can easily configure aspects like the verb (GET, PUT, POST etc.), set the number of iterations, toggle between sequential and parallel requests or set request timeouts. Finally, one of the great inbuilt features of Clobbr is its features for data storage. All your data is stored locally ensuring maximum privacy.
Clobbr doesn't store any request or result data on a server. There is no requirement for an account, and no data is shared with third parties.
Designed for ease of use, TablePlus has a friendly and simple GUI. It provides support to a variety of relational databases including MySQL, PostgreSQL, SQLite and many others including some NoSQL databases. Its native build and simple design paired with powerful features enhance the speed and efficiency of database management.
TablePlus allows for fast and easy querying, editing, and management of databases. It has a start-up time of just half a second, ensuring swift operation. In terms of database security, TablePlus scores high with its various security features that include multi-step authentication support, native libssh, and TLS to encrypt connections.
The appearance is customizable to fit the users' personal preferences. The application also boasts of an intuitive spreadsheet-like editor that enables browsing, querying, editing of data, and database structure.
Video To Photo is the cheapest option at $3.99 one-time.
Yes. SmartRSS: RSS Reader & Podcast, Kanmail and Switchbar offer a free tier, with a one-time upgrade if you need more.
These apps run on Linux, Mac, Windows and Browser Extension.
No. Every app on PayOnceApps is listed because it sells a one-time (perpetual) license. Some also offer a free tier or trial. Prices are checked against the developer's site but can change, so confirm on the app's website before buying.