Features

The following designs and many more are possible:

• simple surveys with and without feedback
• complex surveys (using skipping logic, personalised text, complex feedback)
• surveys with eligibility limitations
• diary studies including completely flexible automated email/text message reminders
• longitudinal studies (e.g. automatically re-contact participants after they return from their exchange year). The items of later waves need not exist in final form at wave 1.
• longitudinal social networks and other studies that require rating a variable number of things or persons

Core strengths

• generates very pretty feedback live, including ggplot2, and interactive ggvis plots and htmlwidgets. We find that this greatly increases interest and retention in our studies.
• automates complex experience sampling, diary and training studies, including automated reminders via email or text message
• looks nice on a phone (about 30-40% of participants fill out our surveys on a mobile device)
• easily share, swap and combine surveys (they're simply spreadsheets) and runs (you can share complete designs, e.g. "daily diary study")
• you can use R to do basically anything that R can do (i.e. complicated stuff, like using a sentiment analysis of a participant's Twitter feed to decide when the survey happens)
• not jealous at all – feel free to integrate other components (other survey engines, reaction time tasks, whatever you are used to) with formr, we tried our best to make it easy.

Features

• manage access to and eligibility for studies
• longitudinal studies
• send text messages (see the HowTo)
• works on all somewhat modern devices and degrades gracefully where it doesn't
• formats text using Github-flavoured Markdown (a.k.a. the easiest and least bothersome way to mark up text)
• file, image, video, sound uploads for users (as survey items) and admins (to supply study materials)
• complex conditional items
• a dedicated formr R package: makes pretty feedback graphs and complex run logic even simpler. Simplifies data wrangling (importing, aggregating, simulating data from surveys).
• a nice editor, Ace, for editing Markdown & R in runs.

Plans:

• work offline on mobile phones and other devices with intermittent internet access (in the meantime enketo is pretty good and free too, but geared towards humanitarian aid)
• a better API (some basics are there)
• social networks, round robin studies - at the moment they can be implemented, but are a bit bothersome at first. There is a dedicated module already which might also get released as open source if there's time.
• more planned enhancements on Github