Monoka<p><span class="h-card" translate="no"><a href="https://genomic.social/@lwpembleton" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@<span>lwpembleton</span></a></span> </p><p>If you mean actual PDF editing (without the need to import from or export to PDF), then there is only one open source project:<br><a href="https://mastodon.social/tags/PDF4QT" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>PDF4QT</span></a> <a href="https://flathub.org/apps/io.github.JakubMelka.Pdf4qt" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">flathub.org/apps/io.github.Jak</span><span class="invisible">ubMelka.Pdf4qt</span></a><br>This is an actual PDF editor. For smaller tasks, there are several apps for reading, highlighting, marking, commenting, reshuffling of pages etc.</p><p>If you also consider a <a href="https://mastodon.social/tags/PDFEditor" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>PDFEditor</span></a> which is not open source, then there is <a href="https://mastodon.social/tags/Qoppa" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Qoppa</span></a> <a href="https://mastodon.social/tags/PDFStudio" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>PDFStudio</span></a> . It is very comprehensive and similarly powerful as Acrobat: <a href="https://www.qoppa.com/pdfstudio/" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://www.</span><span class="">qoppa.com/pdfstudio/</span><span class="invisible"></span></a></p>