Suggestions for gtex-letter

The following packages have something in common with the package gtex-letter. The packages are ordered in decreasing similarity.

Package dinbrief-gui: GUI for LaTeX package dinbrief
Package lxmail: A letter-generator that produces LaTeX output
Package gbrief-creator: A front end for the gbrief package
Package context-letter: ConTeXt package for writing letters
Package envelope-letter: Draw a layout to fold the first page of a letter into its own envelope
Package formlett: Letters to multiple recipients
Package postage: Stamp letters with »Deutsche Post«’s service »Internetmarke«
Package address: Generate form letters and address labels
Package block: A block letter style for the letter class
Package fullblck: Left-blocking for letter class
Package fax: Document class for preparing faxes
Package postcards: Facilitates mass-mailing of postcards (junkmail)
Package yaletter: Extremely flexible macros for letters, envelopes, and label sheets
Package cdpbundl: Business letters in the Italian style
Package envbig: Printing addresses on envelopes
Package myletter: An old letter class
Package serial: Generate serial letters
Package scrlttr2copy: A letter class option file for the automatic creation of copies
Package beletter: Typeset Belgian letters
Package bellmac: Outline scheme for form letter production
Package envelope: Print envelopes
Package make-env: Print USPS standard envelopes
Package shsulet: A letter document style for use at SHSU
Package leiletter: A letter class for Leiden University
Package lettre: Letters and faxes in French
Package scrletter: Letter extension to KOMA-Script classes
Package cjw: A bundle of packages and classes
Package fribrief: Two LaTeX classes for writing letters in German
Package frletter: Typeset letters in the French style
Package gcard: Arrange text on a sheet to fold into a greeting card
Package hc: Replacement for the LaTeX classes