Trilium Notes - Trilium Notes is a hierarchical note taking application.
PowerSchool - PowerSchool provides a K-12 education technology platform for operations, classroom, student growth, and family engagement.
Learn Swift - Screencasts & code examples to learn Apple’s new Swift
Clever - syncing between education applications for K-12 schools
Google Keep - Capture notes, share them with others, and access them from your computer, phone or tablet. Free with a Google account.
Claroline - Claroline is a collaborative eLearning and eWorking platform.