Exactement !
/e/OS default applications
All pre-installed applications are open source applications except for the Maps app (read details about this in the Maps FAQ).
Web-browser: an deGgoogled fork of Chromium, built from Bromite patch-sets, with specific /e/OS settings. It features an ad-blocker by default.
Mail: a fork of K9-mail for better user experience, some bugfixes and support for oauth, with OpenKeyChain for PGP encryption support
Message: a fork of QKSMS
Camera: a fork of OpenCamera
Dialer: default Android dialer application
Calendar: a fork of Etar calendar, that fixes crashes with calendar invitations
Contact: default Android contact application
Clock: a fork of Android deskclock application
Gallery: default Android gallery3d application
Filemanager: Android documentsui application
Sound recorder: default LineageOS sound recorder
Calculator: default Android calculator2 application
Keyboard: default Android keyboard
App Lounge is the /e/OS application installer, that offers millions applications. Applications are accessed from Google Play Store (commercial apps), F-Droid (open source apps) and also Progressive Web Apps, all at a single place. App Lounge features a “Privacy Score” for each application, computed from the number of trackers found by Exodus Privacy in each application, and from the number of permissions.
Other preinstalled applications:
Maps: MagicEarth (read the Maps FAQ for details about its license)
PDF reader: PdfViewer Plus
Notes: a fork of NextCloud Notes to support Murena online accounts
Tasks: OpenTasks