BlackBerry will launch four new smartphones this year and a new package of cross-platform applications, as it continues its shift to making software. The company unveiled its BlackBerry Leap phone at the Mobile World Congress show in Barcelona on Tuesday. The 'low-to-mid' priced market phone will go on sale in Europe in April. Three more phones will follow. CEO John Chen says that since he took over a year and a half ago, BlackBerry is now 'committed to making software as a business.' Blackberry will roll out 'BlackBerry Experience,' a set of three software packages focusing on security and communications for business and government customers over the next year.