WindowSill is a free utility tool for Windows, similar to MacBook’s TouchBar, to boost daily productivity. It lives on the edge of the screen, offering a set of customizable tools that stay accessible regardless of which application is active. It is designed for power users who want to minimize flow breaks.

WindowSill acts as a centralized hub for AI writing, media management, and system utilities. By attaching it to any monitor edge, you can interact with your files and text without constantly switching between windows. It is a lightweight but powerful companion that aims to simplify complex workflows through a single interface.

A command bar with more to offer

WindowSill’s standout feature is the AI Text Assistant, which supports both online models like ChatGPT and offline servers like Ollama for maximum privacy. You can instantly summarize, translate, or rewrite text by selecting it. The bar also features a Smart Converter that automatically identifies currencies, temperatures, and digital units, displaying live conversions in real time without requiring any manual data entry.

Beyond text, the utility offers media and meeting controls, currently supporting Microsoft Teams with more platforms on the way. The clipboard history is well-designed, featuring screen recording protection to hide sensitive data during video calls. For those who deal with many files, the drag-and-drop image utilities allow for quick batch resizing and format conversion, replacing several standalone, bulky editing programs.

However, some technical hurdles remain, as certain users have reported severe system instability and window "jumping" bugs on newer Windows 11 builds. The setup process for offline AI models can be a bit tricky due to potential firewall conflicts with local servers. Additionally, while the bar is customizable, some find the inability to pin standard tray icons or remove the thin border a missed opportunity.

Unexpectedly essential

In conclusion, WindowSill is a highly useful tool that adds a touch of modern, hardware-inspired design to the Windows desktop. It excels at keeping essential utilities within arm's reach, especially for users who juggle writing and data conversion tasks. Despite some early-stage performance bugs, its unique approach to multitasking makes it a very promising addition to any productivity toolkit.