Evernote - Bring your life's work together in one digital workspace. Evernote is the place to collect inspirational ideas, write meaningful words, and move your important projects forward.
Findchips - Findchips is a database for searching electronic parts and components and provide datasheet and bill of materials from multiple distributors and manufacturers.
Standard Notes - A safe place for your notes, thoughts, and life's work
Digchip - Digchip is an electronics database and documentation search engine that also acts as a 3rd party agent between distributors and buyers.
Joplin - Joplin is a free, open source note taking and to-do application, which can handle a large number of notes organised into notebooks. The notes are searchable, tagged and modified either from the applications directly or from your own text editor.
SourceMe - Browse one of the largest worldwide database of reliable manufactures of industrial sensors, encoders and cameras. Improve your supply chain with trusted contacts!