Here is the list of companies I have invested in over the past 3-4, and what they do. Netcore is the company I run full-time.
Netcore: Enterprise Mail + Security; Mobile Data
Novatium: Sub-$100 Network Computers
Rajshri Media: Bollywood-centric Broadband Video Portal
mChek: Mobile Payments
Midas: Wireless Communications Equipment
New Horizon Media: Language Publishing (Books)
ValueFirst: Enterprise Mobility Solutions
Yos: Personal Healthcare Records
Greynium: Local Internet Portals and Classifieds
Intelizon: Solar for Rural Electrification
MobiFusion: Consumer Mobile Apps
Two companies I have recently committed to investing are both in the education space:
Pathfinder: Knowledge Publishing
Global Talent Track: Vocational Education
My new investing has slowed because I find very little time outside of Netcore and the current portfolio to spend time on newer opportunities.