Does anyone know how I can make a list of all my posts available in alphabetical order in Tumblr?
It is possible by via the Tumblr API, as it does provide the ability to request the Text posts for a blog and return the results as JSON-encoded objects. You can then use code to sort these results alphabetically.
Tumblr API Details - www.tumblr.com/docs/en/api/v2
Here is an example of a request and what you will get in the response - http://api.tumblr.com/v2/blog/citriccomics.tumblr.com/posts/text?api_key=fuiKNFp9vQFvjLNvx4sUwti4Yb5yGutBN4Xh10LXZhhRKjWlV4
You can get a better look at what this all means (i.e. each separate post) by using this online JSON viewer - http://jsonviewer.stack.hu/#http://api.tumblr.com/v2/blog/citriccomics.tumblr.com/posts/text?api_key=fuiKNFp9vQFvjLNvx4sUwti4Yb5yGutBN4Xh10LXZhhRKjWlV4
Making this happen would not be too difficult for a PHP or web programmer.