(Feel free to edit this page to report progresses, discoveries, etc... Also add an entry in other language's pages, maintainers will do translations.)
06 Nov 2011 - First Ndless 3 preview
27 Feb 2010 - Ndless released, Nspire Models Opened to Third-Party Development
09 Dec 2008 - The OS version 1.6 is officially available: http://www.ti-nspire.com/tools/nspire/resources/download_upgrade.html#table
17 Nov 2007 02:10 GMT. - http://www.irc.vc/nspire/ - First release of TI-Nspire Text Editor. (Version 2.0 Released)
10 Oct 2007 05:07 GMT. - http://calcg.org/cgi-bin/forum.cgi?t=8207 - Brandon Wilson has released a small utility that fixes MirageOS on the Nspire's TI-84+ emulator. Send the small program to the emulated 84+, run it, and MirageOS will then work.