Inc is described as 'is your team's workspace for sharing and organizing knowledge' and is an app in the Office & Productivity category. There are more than 50 alternatives to Inc for a variety of platforms, including Windows, Online / Web-based, Android, iPhone and Mac. The best alternative is Joplin. It's not free, so if you're looking for a free alternative, you could try Standard Notes or CherryTree. Other great apps like Inc are Cryptee (Freemium, Open Source), Notezilla (Paid), Notejoy (Freemium) and MemPad (Free).
Joplin is a free, open source note taking and to-do application, which can handle a large number of notes organised into notebooks. The notes are searchable, can be copied, tagged and modified either from the applications directly or from your own text editor.
Colorful & powerful sticky notes app for Windows & Phones. Set reminder alarms, attach them to any website or document, organize them using folders/tags, sync sticky notes between devices & send notes across LAN or to any contact across the globe.
NixNote, formerly Nevernote, is an open source client for Evernote . It is written in Java so it will also run on Windows & OS-X, but the primary focus has been to try and get a usable environment for Linux.