DEVONthink Alternatives for Mac OS X

Zim is a graphical text editor used to maintain a collection of wiki pages.

Zotero is a powerful, easy-to-use research tool that helps you gather, organize, and analyze sources and then share the results of your research.

wikidPad different from other notepad applications is the ease with which you can cross-link your information.

NixNote is an open source client for Evernote.

RedNotebook is an open source diary and journal software for Linux, Windows and Mac.

Piggydb is an open source Web notebook application that provides you with a platform to build your knowledge personally or collaboratively.

nvALT 2 is a fork of the original Notational Velocity with some additional features and interface modifications, including MultiMarkdown functionality.

Zoho Notebook takes the same catch-all approach as Evernote and OneNote, but has a few design ideas of its own.

Yojimbo makes keeping all the small (or even large) bits of information that pour in every day organized and accessible.

MyTetra is a smart cross-platform manager for information collecting.

myBase is a unique free-form database software that allows entry of unstructured text, webpages, images, documents, emails and even arbitrary files.

NoteCase Pro is to quickly capture, organize, protect, access, and recycle your information.

Curio is a collection of unique hotels, each with their own history and character in cities across the globe.

BeeCanvas is an online whiteboard based visual collaboration tool.

Elephant is a notetaker with a classic interface.