i4t.org
Three characters fits alongside partner logos, survives being printed small on a report cover, and makes an email address people spell correctly after hearing it once. In the institutional sector those are the real requirements.
I4T reads as innovation for tomorrow, investment for training, or infrastructure for trade. Innovation for tomorrow is the broadest, suiting a foundation, an innovation fund or a research programme. Infrastructure for trade points at development finance and trade capacity work.
The 4-as-for convention is now standard in programme naming across development, education and philanthropy, so the audience parses it correctly without a key.
The name is listed. Offers considered.