OBS (Open Broadcaster Software) is free and open source software for video recording and live streaming. Stream to Twitch, YouTube and many other providers or record your own videos with high quality H264 / AAC encoding.
Obsidian
Obsidian: A knowledge base that works on local Markdown files.
Offline Explorer Enterprise
Offline Explorer Enterprise is a software solution that you can use to download websites in order to view them later, in offline mode.
OHSOFT
Power PC Tools.
Okular
Multi-platform, fast and packed with features, Okular allows you to read PDF documents, comics and EPub books, browse images, visualize Markdown documents, and much more.
Olive
Olive is a free non-linear video editor aiming to provide a fully-featured alternative to high-end professional video editing software.
Ollama
Get up and running with large language models.
OllyDbg
32-bit assembler-level debugger.
One Commander
One Commander is file manager for Microsoft Windows with re-imagined user interface and experience of navigating filesystem and managing files.
One Drive
Get to your files and photos from anywhere, on any device. Share and work together with anyone in your work and life.
OnlyOffice
ONLYOFFICE is an online office suite integrated with a collaboration platform to manage documents, projects, team and customer relations in one place.