eSpeak for Android is a port of the eSpeak Text-to-Speech synthesiser to Android, supporting 75 languages and accents. It is based on the eyes-free version, but with improved language selection and language name display, support for accents and special characters, improved handling of speech rate and pitch, support for MIPS-based devices, and improved support for SSML.
ViziSolve solves math problems. It does this by going one step at a time, highlighting each part as it is being used for the next line, and stating what it is doing at each step. Right now, it can solve most common algebra I level problems (not including graphing or word problems), and it may make a mistake once in a while. It runs on the Web.
Atmail is a fully-featured email server and Webmail client, allowing users to send and receive email via a Web browser or mobile device. It has full support for IMAP mailboxes, and an optional email-server mode that uses EXIM as the MTA. Features include a scheduler, MySQL backend support, spell-check, address book, calendar user preferences, multiple accounts, SpamAssassin support, migration scripts from other mail servers, a customizable interface, an attractive AJAX interface, an optional group sharing Calendar/Addressbook, and an Outlook plugin to sync Contacts/Tasks/Calendar data between a Desktop, Mobile, and Webmail client or other email users.