diff --git a/source/slides/stuff.qmd b/source/slides/stuff.qmd
index 30865bc..5cff373 100644
--- a/source/slides/stuff.qmd
+++ b/source/slides/stuff.qmd
@@ -7,6 +7,7 @@
 ## Alternativen | Sonstiges
 
 - PayPal, ApplePay, GooglePay → ([Wero](https://wero-wallet.eu/)), ([bluecode](https://bluecode.com/en)), ([GNU Taler](https://www.taler.net))
+- Microsoft Office, GoogleDocs → [LibreOffice](https://libreoffice.org/), [Collabora](https://www.collaboraonline.com/)
 - Dropbox, iCloud, OneDrive → ([Nextcloud](https://nextcloud.com/))