Apps with 'Theme changing' feature

Cerebro is an open source and free electron-based productivity software alternative to Alfred and Spotlight. It is focused on speed and good UI and UX.

"Pendulums" is a completely free time tracking tool which helps you to manage your time in a better manner using an easy to use interface, useful statistics and unlimited in team members on each project.

Visual Outliner is an outliner software for Windows, and it uses OPML as native file format.

My Diary - Journal, Diary, Daily Journal with Lock supports setting a diary password to protect the security of your memories and private journal. Sync your diary journal to Google Drive or Dropbox to ensure security and keep diary entries can be accessed on different devices.

Rocketium is an online app that helps you create beautiful videos in minutes with text, images, voiceovers and footages. Just upload your graphics, type text, choose a theme and away you go.

CakeReader collects the content you care about. We help you discover quality content, subscribe and read with ease and organize everything in one place. You can add your own RSS feeds and subscribe to Youtube channels aswell to bring all your favorite content at one place

Translating text for hours doesn't have to be painful. Meet tradugo, a clutter-free, cloud-based app for translators looking for something different.

Gila CMS is an open source content management system. Made with PHP7 and MySQL. You can use it for your blog, web store and personalise it for your business needs.

This is a simple Firefox WebExtension that allows you to automatically switch between your themes based on the current time.

An easy to use ebook reader application that ensures a pleasant reading experience. The reader interface has a fresh feel and smooth transitions that make you read book after book on it. Lektz Reader supports EPUB2, EPUB3 and PDF format ebooks.

ThemeKit is a macOS application that allows you to apply custom-built themes to your applications. The goal is to mimic a theme manager from the iOS jailbreaking community which allows you tomap icons with a bundle ID and distribute easily.