I second the use of Excel or any spreadsheet program for documenting a personal collection. I use it for all my own specimens even including those I have donated to MOR or F — as Chris says, it’s also easy to make labels using Excel and the Word “mail merge” function, and it’s easy for others to import into their system, so that would also recommend a basic spreadsheet. I attempted to switch to Microsoft Access as a more formal database structure at one point, but never got around to it as a basic csv or xls file is simpler for the less tech-savvy like me.
I’m in turn pleasantly surprised just to hear this! I’ll have to look up who to contact there then.