Transliteration

"Provides one-way string transliteration (romanization) and cleans file names during upload by replacing unwanted characters.

Generally spoken, it takes Unicode text and tries to represent it in US-ASCII characters..."

Calendar

Creates calendars - integrates with Views. If you need a calendar and don't know this module, try it :)

TableField

"This module allows you to attach tabular data to a node in Drupal 6 or any entity in Drupal 7." Data can be exported to CSV (D7).

Webform Validation

adds the ability to validate form submission data using a bunch of preset rules
  • Numeric values (optionally specify min and / or max value)
  • Minimum length
  • Maximum length
  • Minimum number of words
  • Maximum number of words
  • Equal values on multiple fields
  • Unique values on multiple fields
  • Specific value
  • Require at least one of