Horizon Calendar - Horizon Calendar is a useful calendar app which integrates weather forecasts. This way you can conveniently see how the weather will be on the date of a scheduled event.
Horizon Calendar can show forecasts for up to 14 days, presented on a smart list that emphasizes the current day
Springpad for iPhone/iPad - Springpad is your own mobile personal assistant that can help you remember all kinds of things. Whenever you find something interesting, you can save it and access it later from anywhere, on your smartphone, tablet or the web. Some of the things you can save include text notes, voice memos, photos, articles, checklists, locations, etc
Sleep Time for iPhone - Sleep Time is an alarm clock that monitors and analyzes your sleep cycles to wake you up in the lightest sleep phase, making you feel rested and relaxed after every night's sleep. Utilizing the phone's accelerometer, the app senses your subtle movements throughout the night and graphs your sleep cycles
Clever - Clever is a smart Evernote client for iPhone and iPod touch. It allows you to easily manage your notes using your mobile device.
The app has lots of useful features, including sounds and animation, multi-account support, customizable menu items, and many more
Calendars+ by Readdle - Calendars is an elegant and easy to use calendar application which works perfectly with Google Calendar and the built-in iOS Calendar.
Calendars lets you manage events both online and offline
ToDo Checklist - To do Checklist provides you with the simplest yet flexible way to manage your everyday tasks and checklists. It keeps all your planned activities, reminds you carefully through notification center and makes it possible to share your task lists with others even without Internet connection.
Add your tasks to one of the preset lists or create your own
Week Calendar for iPhone - Week Calendar is a powerful calendar app for people with a busy schedule.
Its user-friendly interface allows you to view your appointments at a glance using a day, week, month or year level overview
iPlan for iPhone - iPlan is a powerful agenda, with handy additions such as famous quotes, weather info, and social media. It allows you to easily keep track of your schedule while on the go from a stylish and intuitive user interface