Apache OpenOffice is the opensource office suite for word processing, spreadsheets, presentation, graphics, database and more.
Anytype is local-first, with end-to-end encryption to securely store your digital assets such as task, notes, ideas, documents, workflows and much more.
Taskwarrior is a free and opensource software that manages your task simple from your command line.
Super productivity as name suggest it makes you super productive by helping you managing, planing, track your task. Connect it with your Jira, Github, Gitlab easily to track everything.
Cerebro is an advanced search tool that can lookup, search anything in your system, workstation or if needed on internet too.
Joplin stands as a versatile, free, and open-source note-taking, to-do application and as an alternative of tools like Evernote and Onenote.