iSchool is a study organizer and Timetable Schedule Planner (for schools and universities). Very minimalistic but has everything you need. Study schedule, notes are attached to classes, homework with notifications, grades, grades analytic. Take a pictures or use voice recording as a note. Very simple. Very useful.
cPMR is very simple and convenient Personal Medical Record organizer for iPhone, which includes: Convention child diary, personal medical record, Electronics medical assistant, Height/weight tracking and Many more.
Good news! CuteTag is already on Android market. Android version has the best features of CuteTag: possibility to build visual map of your notes, back up all data to web-cloud, choose favorite tags etc. The current version of the app is free but has a 200 record limit.