Trilium Notes - Trilium Notes is a hierarchical note taking application.
Mendeley - Easily organize your papers, read & annotate your PDFs, collaborate in private or open groups, and securely access your research from everywhere.
Learn Swift - Screencasts & code examples to learn Apple’s new Swift
JabRef - Graphical Java application for managing bibtex (. bib) databases.JabRef · JabRef Help · JabRef | Blog · OpenOffice/LibreOffice .
Google Keep - Capture notes, share them with others, and access them from your computer, phone or tablet. Free with a Google account.
Citavi - Citavi is a program for Microsoft Windows that manages literary references and organizes organizational knowledge.