JournalCat is described as 'simple and fast private journal. Use it to keep a diary, document your work progress, write your thoughts, create reminders, organize your ideas. You can categorize your life in tags, search your history and view extensive statistics about your thoughts' and is an website in the Office & Productivity category. There are more than 25 alternatives to JournalCat, not only websites but also apps for a variety of platforms, including Android, iPhone, Windows and Android Tablet. The best alternative is Evernote, which is free. Other great sites and apps similar to JournalCat are Notezilla (Paid), RedNotebook (Free, Open Source), nvALT (Free, Open Source) and Leanote (Freemium, Open Source).
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.
RedNotebook is a graphical diary and journal helping you keep track of notes and thoughts. It includes a calendar navigation, customizable templates, export functionality and word clouds. You can also format, tag and search your entries.
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.
Diaro is designed to record your activities, daily events, appointments, experiences, thoughts, secrets and ideas throughout the day and sync data across all your devices. It is the easiest and most secure way to keep a diary.