stevethekiller/killernotes

KillerNotes is a Windows desktop notes application built to replace the habit of keeping dozens of open Notepad windows for quick technical notes. It presents itself as a single searchable notepad instead, aimed at technical support workers and anyone who juggles many small pieces of information during their workday. The app stores all notes in one SQLite database and lets you search across titles, text, and tags instantly as you type, using SQLite's built in full text search feature. Notes can be organized into named, color coded groups, and tagged with colored labels you can filter by. The editor supports rich text formatting including bold, italics, lists, tables, and inline images, along with adjustable font size and a color picker with an eyedropper tool. Notes save automatically as you type, when you switch notes, or when you close the app. For sharing, a single note or an entire database of notes can be exported as a file that opens with a double click on another computer, and can optionally be protected with a password. Password protection encrypts the whole database using SQLCipher with AES-256 encryption. There is no way to recover a lost password, so users need to keep track of it themselves. The app also supports switching between multiple separate databases and includes a markdown and HTML preview pane, six visual themes, and eight bundled languages including English, Spanish, French, German, Turkish, Chinese, and Japanese. Technically, KillerNotes is written in C# using WPF and targets the older .NET Framework 4.8, running on 64-bit Windows. It relies on a handful of packages for SQLite access, SQLCipher encryption, and markdown rendering, and is packaged into a single signed executable file so nothing extra needs to be installed separately. The README does not mention a license.